Contract not cancelled

My telkom smartplan 100 contract was suppose to end in december 2017. I forwarded a cancellation form 1st on the 29th of september 2017 to the telkom cancellations dept and did not receive any respons. i then called the call centre and they instructed me to forward another cancellation form which i did again on the 27th of nov 2017. i still never received any respons from telkom and called the call centre. they informed me that the contract will end in december. to my suprise telkom again loaded minutes and data on the 1st of jan 2018 and according to me i was suppose to be on prepaid and now i paid R253 on the 20th. i called the call centre and was informed that my case will be escalated and yet no feedback was received and its been alomost 2 weeks now. i forwarded the emails to two consultants now in january 2018 who promised to escalate my complaint and will provide feedback. I plead with telkom management to sort out my problem. My telkom account no: ********** 81 and the cellphone number ********** 569. my next step is to take the matter further to the consumer protection if my matter is not resolved. Cancell my contract and put me on pre-paid as i requested on my cancellation forms.