Inadequate service from MTN South Africa and SUMMER MOBILE

I've been forced to pay for a contract that expired almost a year ago now, just to get MTN to attend to canceling a contact that expired December 2022. It seems that there was some sort of ***** done by Chesslyn at Summer Mobile. He locked a phone and contract that I don't have. I have to now miraculously prove that the phone is still in their store/warehouse. Meanwhile my so called account in arrears is growing rapidly every month, while MTN are the ones owing me all the monthly payments for a phone I do not have and a contract I don't have. None of their employees were up to now... 10 months later... able to close a contract that stays open after several attempts to close it because like I said has EXPIRED!