Extremely Poor Service -"Always over promise and NEVER deliver "

I have no idea were to start or to begin to even rate MtN South Africa, because even a 1 star rating is not suitable.I have been experiencing stress and anxiety since last year December 2020 regarding my mtn contact.I requested to cancel my contract in December 2020 with no assistance up till to date...I have been billed incorrectly and was promised by various mtn service consultants that my account will be credited and thereafter the line will be cancelled.MTN has continued to bill me up till to date...I have no were to go and no one to call.During the birth of my new baby I've spent countless number of hours and calls and e-mails with still no assistance.To be more precise I have made over 30 calls spent hours on hold and have received over 40 references for my calls and still nothing.Can someone please help me.I have reached a point of no return.In store consultants tried to assist with teleconference and still nothing.My kids need to do online learning and because of MTN we could not afford wifi until this one has been cancelled.My contact details are *** if someone can urgently assist me with a resolution. MTN has not listed me as outstanding payment for something I had no control over.