CANCELLING CONTRACT WITH NO RESPONSE

I have tried numerous times to get hold of a manager or the assistant manager who helped me when I first signed up over a year ago. I have only been about 5 times, all in 2014. I was transferred to JHB for work purposes and am now 7months pregnant. Needles to say, I have tried cancelling this contract or putting it on hold but NOBODY RETURNS MY CALLS/emails. I get promised ALL THE TIME that my messages will be given to the people in charge yet STILL NO FEEDBACK! I have paid for over a year now without even being in a vicinity close to a Zone Fitness but it now seems like after 11 phone calls, 8 messages and 2 emails, this company only takes and never gives. Worst worst worst service I have ever received. No wander everyone goes for the competitors and I know understand why most people complain about this company. Absolutely shocking that whenever I call, NO MANAGERS OR ASSISTANT MANAGERS ARE IN STORE TO TAKE MY QUERY. ARE THEY ALL ON HOLIDAY???