MTN not letting me out of contract when termination is due

My contract term is incorrect on MTN’s system. It is supposed to end this month, on the 14th of May 2022 (as confirmed by someone from their Legal Department via e-mail on 2 December 2021). I have been trying for over 6 months to have this corrected so that I can end my contract and be done with this horrible company for good, but they are not helping me. All I keep hearing is: ‘a request has been submitted’ and then I don’t hear from them for months. What am I supposed to do. They have changed it so you can’t phone the legal department, and can only reach them by email. I’ve contacted MTN in numerous ways, even on social media and nobody wants to help me. The representative at the store advised me to complain on HelloPeter if I want response. How pathetic. So here I am. Please MTN I just want to cancel my contract.