MTN WORST SErvice

Mtn has put me through the most these past 2 months as one of their sales agent falsely advertised a product to me then when I found out and tried to cancel that is when my misery began. I had to spend a couple of weeks trying to get to the right department in order to cancel this this new number where no one no one in their contact center could see and I was told about 3rd party sales agent as if that is my problem after being from pillar to post by their agents. A number of them just plainly told me "there's nothing they can do" and my question is if they do not know what I can do how I my suppose to know as I do not work there even know their operations. After all the waiting and back and forth I eventually received a call from from private number I could not see and the guy assured me it would be canceeld I just have to return the sim I got to my nearest MTN store. This did not make sense to me but I thought let me just do this, That is when my other issues started as I went to 3 different MTN stores and they did not want to take the SIM as they said they do not know what to do with it and if the contract was really cancelled there's no need for returning of this sim which I never used and expressed when I received it that I DO NOT WANT A NEW NUMBER. All of this is even documented on twitter in my DMs and on the timeline me telling them i do not want this new number as it was given to me under false marketing which I am sure is *******. After me not being able to return this sim I knew that I will be charged for this new number hence I left the exact amount im usually debited in the account which normally my debit order goes off on. And yes it happend where at the end of last month I was charged or debited for this new number/sim even after was called and told it will be cancelled. All of this is costing me money now as we all know that when a debit order bounces the account holder is charged for that. You guys even have the nerve to send me a message telling me payment was not successful and you still added that new sim amount on the money you guys say I owe you. You guys are costing me money now for your own incompetence and I am willing to cancel everything if this is not resolved I do mind paying the balance of my outstanding contract as I will not allow myself to be ****** by you guys. Why should I go through all of this???