DailyIndieGame (DIG): Market - Bought Bad Key

This is no big deal and it is clearly stated that sales are not guaranteed on the Market, so I don't expect DIG to give me a refund.

Is there any way to try to get the problem fixed? Of course I'd like a working key for my whopping 6 cents spent...

I also clicked "Negative" on the seller, but other than that, I don't see any way to give feedback or attempt to fix the problem.

I did write support asking the same question and clearly stated that I do not expect DIG to refund me or give me a key.

The game is Hangover if anyone is curious. Just bought a duped key for 6 cents.