Talking to Bitstamp is like talking to a brick wall...in their opinion Raiffeisen Banka is their bank and Raiffeisen Bank international is an intermediary; therefore we have to pay all the costs of this botched transfer and can seemly no longer withdraw funds (because of this intermediary that is supposedly totally unrelated to Bitstamp or their bank)
They are correct, however it seems reasonable that Raiffeisen Banka (Slovenia) would resend the transaction through some other intermediary.. how can they possibly justify sending Bitcoin related transactions through a bank that they know will reject them? Bitstamp needs to demand a refund on the failed tx from Raiffeisen Banka and make them resend it some other way.