I think the least stake can do is respond to the customer in this case. Not responding at all is worthless. Regardless of whether the conditions have been violated or not.
Their support team should be available 24/7. Reaching out to the forum is a good idea, maybe they will reply in here.
I have to agree, response is an indicator that Stake.com is going to resolve the issue with the customer, silence will only make them the bad guys in this accusations. Hopefully OP can get his/her money back because AFAIK Stake.com is a reputable website and they will do anything in their power to not cause any problems that will taint their image to the public. To OP, do not worry because I think Stake.com will not run off over a petty cash, they are a big business now so they wouldn't bother with that amount of money.