NEVER GO TO VIRGIN ACTIVE

I have had issues with virgin active since I tried to cancel my account in May. I wanted to change over to vitality but after being informed that it would cost R1000 to activate (which I did not have) I decided to cancel my contract. I then paid the cancellation fee. I have since been contacted by their lawyers saying that I owe them money, being the R1000 activation fee and my monthly contract fees to date. How does this make sense, why would I cancel my contract PAY the cancellation fee and activate another contract? I would have loved to join virgin active again when I had the R1000 activation fee but am now totally decided against it. Every time I call to be put through to the accounts department so that someone can help me they put the phone down on me. I feel helpless. I am still young and don't want a bad credit record, hence I paid my cancellation fee in the first place.