This is mass block, it happened regardless of where You used Your card or Your balance, or Your limits or anything for that matter. Polish users did get blocked too without any reason.

I've wrote to Polish friend. It happened the same with him. And he gets same shitty answers from them, he's in UK and do not have possibility to go to branch, he even proposed mailing scanned docs - got ignored.

I've asked them if card will expire and to this time i will specify return IBAN will they send money there (it's stated in their TOS that after expiration funds are returned to specified account) for now they're ignoring my question for 2 days. And even if they answer in positive manner i still think that this money will never reach me, even after 2 years. As Banksters are just common thieves.

It's funny. We all know that prepaids like to be used in shady way, but most of use used it only for some small payments, did not exceed any limits and truth to be told - if You used card for almost a year it's hard to say that You used it in any fraudulent way, because it would get blocked in first month. It looks like it's just calculated action by mBank.

I give a week for trying to clear this situation up. I have 4 cards and almost 600$ usd on them and i will definitely not go to Poland to get it back (costs are much bigger). If after week nothing happens i'll already asked my Polish friend for some pointers to which financial portals/blogers/reviewers write. I will post that here to, then we can start spamming, even if fund will be not returned they will at least suffer a little. From what i heard it's one of the worst banking institution in EU.

Of course You can get a lawyer in Warsaw, but costs will probably still exceed amounts on cards.