Deducting my account without authority

Got a call from Prince recruiting me to join the gym. I informed him i was a mermber just not comin because i had major operation and need my account frozen while still recovering. He said i should come to gym with my card he will help me. I went there in June and he asked if I was using Discovery or not. I told him YES and afraid I could lose point because for not attending accordingly. I asked him what to do then he said he could help swipe my card if I gave him something in return. I was shocked that there was no other way of freezing Acc even when clients are sick. Neverthelesse he agreed to swipe n told me he was gonna go on leave but would still leave my card with someone who'll swipe everyday for me. I realised I was getting better n called prince around July to say i need my card back as Dr told me I should do small exercises everyday. He said he would leave my card at reception. I went there several times asking for my card n was told prince HV my card. I wattapp him many times until I was literally refused access to gym. Virgin active had deducted 625 instead of 125 this morning without authorization. Is this ethical? I want my money back n membership cancelled pls