Return and exchange of items are based on the seller's terms and conditions.
For most cases, it would involve the following steps:
- Buyer needs to contact and clarify the reason for returning item.
- Buyer needs to ship back the items to seller.
- Seller reimburses the buyer by sending an exchange or offering store credit or offering a refund.
However, this does not apply to all sellers. You need to refer back to the seller on whether you are allowed to return the purchased items.