Unhappy MTN CUSTOMER

I'm a contract customer since 2010 and never had a problem with MTN. But lately there system is realy up to #$%&. Since covid I struggle sometimes ro make a full payment each month. When it happens then I call to make a payment arrangement and before the new month starts my account is paid in full. So Sept 2022 I made an arrangement again and 2 weeks later that arrangement was paid up to date. Because I make payments via EFT my lines get suspended in 2 days if I don't make my payments on the 1st of each month. May 2023 is also n bit of a struggle, so I made a 3/4 payment and call to make an arrangement. The answer that I got: the system doesn't allow me to make an arrangement due to an arrangement that wasn't kept in Sept 2022. How is that possible?! When I finnaly spoke to legal they said the system can't be override and I won't be able to make arrangement in the future. Today I paid the full outstanding amount and called again. Same story, sorry you're not allowed to make an arrangement due to Sept 2022 and you'll have to wait until the system opens up the lines. I must say, the tec who wrote the system clearly didn't know the needs of customers and isn't customer friendly.