Case I: If the received product has a manufacturing defect, Qikink will offer a refund or replacement. You’ll need to provide proof, such as an unboxing video or images of the defective product.
Case II: Qikink does not offer exchanges. If a customer wants to exchange a product, they must place a new order. To return the original product, use the "Create Reverse" option in the Qikink panel. This will automatically arrange for the return from the customer’s location to Qikink’s warehouse.
Refer to this link for more information
https://help.qikink.com/portal/en/kb/articles/managing-replacements