Sales reps just opens accounts

i joined virgin active 3months ago. when i app**** i had my account details on my phone.<br> when i gave him the details i couldn't see 3 digits of my account.<br> i told the sales rep that i will come back in 10min to bring him my account details.<br> when i got back to the gym i asked him if i could give him my correct account details. <br> he said no its fine he has sorted it out. so obviously the money didn't deducted from my account.<br> now they left me a message saying that i owe them money.<br> I understand that i have to pay but why do they allow someone just to apply with the wrong account details.<br> Now this looks bad on my name. i have emailed them asking to please phone me. but then i missed the call when they phoned the next day after 3pm.<br> will finish my year and move on from virgin active<br> this is really unacceptable.