Bad service

MTN is the worst service provider you can take a contract with. In 2019 I took a 2 year contract paying R230 untill 4 months back I saw my bill being over R1000 I called to enquire was told that there was a ********** upgrade done on my account. I was advised to send an affidavit and certified copy of my ID. I sent the documents on the 23rd of July but even today I am not getting any assistance I keep on getting a bunch of useless reference numbers each time I call. 4th of October was suppose to be the last day of my contract called in to cancell the contract but could not because they said I have outstanding fees explained everything and as usual I got a new reference number, the ticket was logged on 11 October but even today when I call to adk for feedback I get told there is no feedback yet. I sent an email to complaints department all I got was an automated response with reference. This is affecting my credit record and I get charged each time a debit order gets rejected but no one cares.