Virgin active and Vitality miscommunication

Month end of August VA debited my account of R640 with was incorrect since am with vitality and qualified for a discount, I called the Lenasia club and no one could assist me, I then called vitality to find out what happened I was then told that apparently I was moved from balance which come with my medical aid to vitality with comes with my life cover from discovery, but it's a fact I never canceled anything on my side they as VA Lenasia changed those things I was dealing with Kevin he then passed me onto Siya who wasn't even aware till recently that he actually canceled my contract and opened a new one, I then called VA head office enquiring about my refund I was told it has been declined and whilst waiting for over 15 mind to know why it was this lady just dropped the call Honestly I thought this company was professional but to my surprise non whatsoever,am still with vitality who gives them the right to debit my account for an amount we did not agree on,I ha e proof that was sent to my by vitality starting that I did not terminate anything regarding vitality.