I cannot redeem or use the code I received

Hello gameflip,

Im purchasing steam gift card but there is problem with the seller. I already open dispute and need gamflip support respond here. The steam wallet code is unusable. I receive code that already been redeemed. I cant use the code, its not legit. The description shown after insert the code :

“The Steam Wallet code you have entered has already been redeemed. Steam Support is unable to issue you a new code.”

The seller not giving respond. This taking too long. Can help me cancel the purchase. Thanks.
My invite code is TU4K4T.
Order id ca95cf62-5db1-467d-947c-913b228ece35.

I was able to cancel this for you.