Deducting money from my account

I enrolled as member at planet fitness at Hennopspark. After about 3 months I was called by Discovery to say there was a problem with Vitality, and it showed that I dont have Vitality, but proof was given to Discovery and the matter was resolved. And then PLANET FITNESS HENNOPSPARK phoned me regarding the vitality and I told them it was a mistake on Discovery side, but all been fix. But PLANET FITNESS just ignored that and keep on deducting the amount of R499 x 2 membership for me and my daughter. I have sent numerous emails to clear this up, I even cancelled our membership. Due to the fact that we have moved and there are no Planet Fitness in our area. So the cancellation fees that I should have paid would be covered by the amount they deducted R499 x 2 end June 2015 and now again R499 x 2 deducted again end July 2015. How far must one go to get this settled. I am fed up with Planet Fitness.