What the hell is a bank transfer refund? How long do they take? How much do they cost? Then you have to get that money back into an exchange, pay the exchange fee again.
Well I'm from Australia. I'm using slang. Well the international wording for it would be refund via international bank wire.
They can take anywhere from 3 to 10 days. Depends on your bank. Free I'd imagine. Email them. They are actually pretty fast to reply.
Depends what currency they sent. I'm assuming USD since miners were paid by USD.