owing too much money that i dont know of and refuse to cancel membership

<p>i signed up with one of the agents on January 2015 , i was told they will debit R99.00 from my account every month on the 25th . on August 2015 i was receive a call that i am owing R1600.00 and i have never been to the gym since signing , according to my knowledge i was debited everymonth but the only call me 8 months later saying they had a problem with my bank. on October 2016 i got a sms that i am owing R8000.00 . </p>