Edgars customer service suck. Why Temu is taking over.

I was in Edgars to try exchange a jersey for shoes but nobody on the floor helped me when I asked. I then decided to exchange the item that still had a tag on. I wasn't allowed without the original receipt even though the cashier could trace the transaction on the system with my cellphone number and print a copy of the receipt. He then gave me a voucher with a code on it. I asked for a receipt and he said he could only give me a copy. So they won't except a copy from me in order to do an exchange but expect me to use a copy when I buy again with their unprofessional cardboard voucher and printed copy of the voucher's receipt? This morning I tried to buy a pair of sneakers online using the voucher code (because the voucher expires 31 May). I was unable to because their system wouldn't accept the voucher number. This is REDICULOUS!!!! I need a refund ASAP!!!!!! Else it is called THEFT.