Cancelled /Expired still debiting account

In September 2014 I went to Planet Fitness,Walmer,Port Elizabeth to cancel my contract which would come to an end in October 2014.I was told by the staff that it was no longer necessary to cancel in writing. After the debit order went through in October I went in and was told it has nothing to do with them and to contact ***.I did so my details were taken and I received no response.I then went back and got another number ***and spoke to Ntebelang Nobela who assured me that the contract would be cancelled with immediate effect.In December 2014 a deduction was made once again in the amount of R185.12. I spoke to Ntebelang who assured me that it wouldn't happen again and said that the debit order went through because I did not give a calendar months notice. Then again in December another amount went off(twice in December) and in January again and then again in February 2015.I have since tried calling the call centre and sending e-mails but had no response.