Dispute under review

My Code: 9MKDLV
Order ID 51579dc6-eb4a-4857-a176-d73b1684a284

Please i cant buy anymore from gameflip because i bought a giftcard from a scammer and it didnt work so i opened a dispute 2 weeks ago but i did not recieve any answer from gameflip and also the seller refused to refund me, and when i try to buy something it get canceled automatically, so id love if you can help me with reviewing the dispute and make an action so i can get my money back and also to start buying on gameflip again.

Order ID 51579dc6-eb4a-4857-a176-d73b1684a284

here is a screenshot that shows that the giftcard didnt work when i tried to redeem it .