Miniclip — charged without my permission

When I signed up for Miniclip I was asked to enter my card details and I did that. That was the biggest mistake I've ever made, I have no idea what was I thinking that moment.
Anyways, I signed up and enjoyed playing Miniclip games. Had a great time there and was happy until the day they charged me.
Miniclip took my money without my permission. I never bought a single game there and never pressed any button which said "buy", "purchase" or something like that.
I tried to get a refund but they did not reply. After that I immediately called my bank and warned them about Miniclip and their fraudulent charges. Bank manager blocked these guys from any further charges. Seems like a scam to me.