Scammer Selling Old Use Key

Scammer id
My Code: YH7QL7.
I Purchase $50 Gift Card And He sent me a old Use Key And I contact steam support and They Give me the Use Date Of The Code.It’s use on 2018-05-30 at 18:38:01 PST.
Please Resolve quickly I need To Buy .
Seller Not Dose not Reply ME.

You need to provide the required proof to the dispute. Posting it here doesn’t really help.

Srry .I was messaging by mistake i post it