MTN LOST ME AS A LOYAL CUSTOMER

I've been a loyal customer with MTN for many years, having three contracts with them. MTN decided to flag me at the bureau for missing one payment, ONE PAYMENT, June 2020. This I only found out February 2021 when I pulled a credit report (my advice: pull your report now and then to check for things like these) I have made the necessary payment arrangements and my account is and has always been up to date. I'm actually an upgrade due on one of my contracts decided otherwise and let the 24 months finish and close my contracts one by one as it finishes. I'M DONE WITH MTN FOR GOOD, JUST FOR WHAT THEY DONE TO ME! IM CHANGING MY SERVICE PROVIDER! (and something that I also kind of don't like about them, they don't offer dual sim cellphones)