My coupon not working.. Receive error message

I was not picked up item and the item purchase canceled. Also my coupon code cant be use any longer. Help pls i dont purchase any item yet with the coupun code given.

Need assist asap before promotion end.
My invite code TU4K4T.

Hello!

Please contact out support team via support@gameflip.com

Send all the evidence you have regarding this. Thanks!