I know that feel.

I started this account to use Steam Wallet for services and recently renewed. But then I found out that I can't pay server transfers with Steam Wallet, and there's no way to know if you don't have an active sub (I tried to transfer to Balmung before resubbing and it wouldn't let me).

I wish I could get a refund so it would be less painful to just go back to my main and transfer her, but they don't refund subs :\

Edit: in my case it isn't even a mistake... they just won't let you know your payment options if you don't already have a sub up!