********** Upgrade on my contract

MTN is by far the WORST service provider I have ever had to deal with. According to records on their "system" my current contract has be upgraded with out my knowledge/consent, by Mobile Communications Glenwood, in the KZN. No one called or made any form of communication with me about this upgrade. It came to my attention on my Dec 2017 statement, that I was been charged more than I should be, according to our contract agreement. I called the customer care dept on the 31st of Dec 2017, so that they can assist in explaining why I was being charged so much money. The consultant wasn't very helpful, she even told me if I wanted answers to go to an MTN store (useless if you ask me). So I went to the Sandton City store and I didn't get much help there. Was sent to the police station to get an affidavit, which I did.went back to the store and a "call was logged". I was told they will get back to me. Went to go follow up, only to find out that the call logged was actually incorrect (this is the second call for the same case).A new call was logged and 3 reference numbers later, I get told that this needs to be logged with the ***** dept and that I need to call the Head office myself( I don't know what the hell they have been doing for the last 3 weeks). I tried calling the number provided but have been on hold for 20 mins with no answer. My current contract was supposed to end on the 27th of Jan2018. I want nothing to do with MTN anymore as its a ****py service provider. They have time to take your money but they cant even sort out their on mess. The debit order going out this month will be the second one going out (were I'm over charged). I have been sent up and down just to sort out this **** and I'm fed up with this now. I want them to cancel this contract that has been upgrade with out my consent and cancel my contract that's coming to an end in a few days. and refund me my money. I would not even recommend MTN to my dog (if dogs could use phones).A very unhappy customer.