Membership Cancellation

I have been a member of Virgin Active for 2 years. Just before my contract ended I gave 20 days notice to cancel my membership before it ended. I was debited for the next month when I shouldn't even have been there. I called head office 3 times each time I was redirected to the local Virgin Active. Then when I talked to them they could not help me and the last time talking to them I was shouted at over the phone and was totally disrespected as n client. I am still busy trying to figure out how this could be resolved.