very poor service

I signed up last year November with a guy by the name of vusi and for the 1st month everything went ok after paying my sign up fee and my 1st month fee which i paid directly to vusi and did not receive a receipt and every month i would go into the gym and pay my fees in cash to vusi and he did not give me a receipt and every month ive been getting calls for mbd saying that my account is in areas so i went into the gym and asked to view my account and till today it hasnt been paid because vusi has been pocketing my money and the managers have done nothing about it because i have complained to them and vusi is still working there! Virgin active LENASIA is really the worst branch! And in my most recent meeting with management at the gym which was in October 2015 i was told that it would be sorted out but till now i havent gotten any feedback from management