Ok, after being given the run around by mbank it seems obvious they don't care about customers.

Phone support simply told me "It was blocked for security reasons, please come to branch"
Bunch of idiots ...

Has anyone here managed to get the funds unblocked by resorting to a Polish resident to unblock the card?

I have 1 VISA card bought via Mateo that was only used for a handfull of transactions and all the money came from the same legitimate source
My freelancing account at odesk.

If someone had any luck, please contact me.
I'm willing to pay a fee to have this mess sorted out

Feel free to email me directly at atomic@luisnet.com

Thanks