Poor Poor - Billing issue for 5 months and no one can sort this out

Been a client of MTN since 2000. Last year they changed from old system to new system. Every month I've paid account via EFT and since Nov2022 to now they can not allocate pmt. I have sent them POP's 56 times and logged 32 Tickets and today I have logged another ***. My lines get suspended every month atlease 5 times and then after logging a new ticket, then lines gets opened. I really do not know any more.