Impossible MTN situation

Some time in 2018 MTN ceased emailing statements and forced me to call them every month to find out the balance I had to pay. Now MTN plays a monthly game of "suspend the line" without notification and because of supposed non payment. I have tried all their billing services app, web portal, etc., but none of them actually work. I must phone every month to find out what the outstanding amount is or I lose my connection. The kicker: my account is not in arrears. And now with a suspended phone I can't contact them to sort it out. After almost two decades with MTN I fear our relationship has run its course. I can't keep losing my connection every month.