EntroPay is a prepaid virtual VISA card, often used by people on gambling sites it looks like. It sounds like your details have been used by someone to get one of these cards perhaps. When I discovered someone had used my bank details online a couple of years ago, I phoned my bank, told them it had absolutely nothing to do with me, and they started a fraud investigation thing. A short while later they refunded my money. I couldn't prove it wasn't me, but they took my word for it.
What did the bank say when you phoned them?