Worst service-*****ing from customers..

I have had the worst service from vodacom. I started a 2 year contract in March of 2018, the contract ended on March 10th this year. I called the cancellations department to do the cancellation in March, it was not done, instead I had a really persistent woman trying to sell me other products. I called again on the 15th of April, the gentleman reassured me that he had done the cancellation, instead my account was still debited end of April, May, June and July, I have been batteling for months to have my contract ended and to be put back onto prepaid. I have spoken to various consultants each time I called and have had to explain my story a million times, I have given dates and times of the cancellation conversations that I've had with these consultants for which they were meant to get those recordings in order to re-imburse me as I have not agreed to enter into.any other contract and have not given permission for them to debut my account for any other services. No team leader even gets back to me, the consultants in the branches are as *********** in the branches as they are at the call centers.. In 2 years I have not ever received a statement and for the first time now I received a statement stating I owe vodacom 498 rand, what a ****ing joke, when they are the ones owing me. They have now finally decided to do the cancellation but now I am unable to use some of the services like purchase data, electricity or airtime on the *111# service and the consultants in the branches have no shame in telling customers they dont know what's going and they have no answers. This has been the worst experience I have had with a service provider. Are times really this tough that vodacom has to ***** peoples money????? I want this matter rectified now. I do not owe vodacom a cent, I would like the monies paid back into my account that I'm owed and my services reinstated. Is there any consultant that actually knows what they are doing??