Three weeks ago Bitcoin were trading at about $12.  So you actually might have come out ahead with the three week delay!

But if you were charged any fees by your bank because your wire instructions were bad then that's no good.  So if that happened you should ask for reimbursement on that (Mt. Gox is reasonable, I would bet they would cover your out-of-pocket costs).

I thought Mt. Gox had a bank in Poland for doing SEPA transfers.  Are you sending an International bank wire instead?