Frequently Asked Questions
Find answers about choosing your oioeos® skincare, placing an order, and getting support.
Choosing & Using Your Skincare
Where can I find product ingredients and directions?
Please check the individual product page and packaging for ingredient information, directions, and any precautions. If you need clarification before purchasing, email us at service@oioeos.com with the product name or page link.
How do I choose products for my routine?
Start by considering the areas you want to care for, the textures you prefer, and the steps already in your routine. Our product descriptions explain each item’s intended use to help you compare your options.
You do not need the entire collection to build a routine that works for you.
Can I use several oioeos® products together?
Follow the directions and precautions for each product. Compatibility depends on the individual formulas and the other products in your routine. If you have a specific combination in mind, contact us for available product information before use.
Are all products suitable for every skin type?
Suitability varies by product and individual skin. Review the ingredient list and any suitability information provided on the product page rather than assuming every item is appropriate for you.
Our customer support team can explain product information but cannot provide personalized medical advice.
Orders & Checkout
How do I place an order?
Choose your skincare product, select any available options, and add it to your cart. Review your order and delivery information, then complete checkout using an available payment method.
An order confirmation will be sent to the email address provided at checkout.
Which payment methods can I use?
The payment methods available for your order are displayed at checkout. Options may vary depending on your location and payment provider.
Can I update or cancel an order?
Email service@oioeos.com as soon as possible with your order number and the change you would like to make.
We will check whether your request can still be accommodated. Changes and cancellations cannot be guaranteed once processing has begun.
I have not received my confirmation email. What should I do?
Check your spam or junk folder first. If you still cannot find it, contact us with the name and email address used at checkout and the approximate order date.
Please do not include passwords or complete payment-card details.
Shipping & Delivery
How can I track my parcel?
Tracking information will be emailed once your order ships. The tracking page may take some time to show the carrier’s first scan or subsequent updates.
When should I expect delivery?
Delivery timing depends on your destination, product availability, carrier service, customs processing, and local conditions. Please review our Shipping Policy for the applicable estimates and details.
What if my tracking has stopped updating?
Contact us with your order number and tracking details. We can review the available information and help determine the next steps. Carrier enquiries may require additional time.
Returns & Order Issues
What should I do if an item arrives damaged, defective, or incorrect?
Please email us as soon as possible with your order number and clear photographs or videos showing the issue, the product packaging, and the shipping label.
Keep the item and its packaging while we review your request so we can advise you on the appropriate solution.
What if an item is missing from my order?
Send us your order number and details of the missing item. Include photographs of the items received and the outer packaging so our team can investigate.
How do I request a return or refund?
Review our Return & Refund Policy, then contact service@oioeos.com before returning an item.
Our team will review your request and provide the applicable instructions and designated return address. Return eligibility depends on the conditions stated in that policy.
Can I send a return to your registered business address?
Please wait for our return instructions before sending a parcel. The registered address listed below identifies the business and should not be used as a return address unless our team specifically instructs you to do so.
Contact Our Team
For product questions, order assistance, or other store-related enquiries, reach us using the details below.
Email: service@oioeos.com
Phone: +852 2197 896
Customer Service Hours: Monday–Saturday, 9:00 AM–6:00 PM EST.
We aim to respond to customer inquiries within 1–2 business days. Requests involving shipping carriers, payment providers, or order investigations may take additional time to resolve.
For an existing order, include your order number and the email address used at checkout.
Business Information
oioeos® is owned and operated by Hangzhou Milai E-commerce Technology Co., Ltd. The company is responsible for the sale of products, order processing, customer support, returns, refunds, and other transactions conducted through oioeos.com.
Brand Name: oioeos®
Website: oioeos.com
Company Name: Hangzhou Milai E-commerce Technology Co., Ltd.
Registered Address: Room 506-21, No. 150 Guangtai Road, Xiasha Subdistrict, Qiantang District, Hangzhou, Zhejiang, China.