MTN SOUTH AFRICA HAS CHARGED ME UNFAIRLY!!!!

Upon arriving at home from being sickly and away for some time I received an email from MTN that my connection had been cut off also charged a fee of R2800 for a router which I had not lost,their decision to disconnect my services was taken without any form of communication whatsoever and they were quick to act without informing me. Initially I took the router back to the store in perfect condition of which they assessed and booked for it to be taken back I was given a ref.no to cancel this huge amount reflecting under my name. A cancelation was done and I took out a new contract because I still needed the wi-fi but MTN to date has not lifted this amount under my name which has placed my name under bad debts affecting my financial health. This previous order was done online and 2 MTN stores have tried to assist with reversing this amount to no success, I have been sent from pillar to post and I believe I'm being taken for ride and find this unfair on my behalf as a customer. 😭😭😭