HORRIBLE SERVICE AND CANCELATION PROCESS.

I have received bad service. They are not loyal to their words. I opened a gym membership account early Feb at Westwood Mall in Westville, the agreement was that Feb would be free and then I would pay R200 in March and April, then in May I would pay the R500. The debit order was set to be charged on the 15th of every month. However, in March I was charged R500 and luckily I had transfered my money an only left R300 because I knew they were to take R200. I called to ask what was the reason and I was told that the Westwood branch did not put the promo in my contract and so the headquarters charged full price. I asked to cancel and they said cancelation would be R1400 and some change on the side. The man that was helping me said he would enquire about my case from the branch and get back to me within 7 days. I waited. Close to month end, I called again because I understood that if they were to charge R500 that means in April that will require R1000 from me(March and April costs). When I called, the lady said cancelation is the same R1400 amount and said that they had not received a response from the branch. In fear, I asked her for their banking details so I could pay for March and I paid the R500 for March. I did not receive any communication from that point going forward and I have not been to the gym since beginning of March. Now I am receiving an email from their lawyers of which I don't understand what the reason is because they failed to do right by me. Why should I pay when I didn't occupy the gym? Why did they want to charge R500 instead of R200? Where is my response regarding their communication with Westwood branch?