You can Initiate a return request against your item/order from mygss.pk complaints
section, if your order is in 7 days return window.
To request a return please create a new ticket and select Return & Refund as a reason, fill out the return request form, attach relevant pictures, unboxing video (google drive link) and submit.
Here is a complete video tutorial to initiate a return request on Mygss.pk 