Account suspended when i have paid in full

I am so disappointed with MTN Their debit order didn't go through on the 25th when i clearly had money in my account. So on the 6th i paid via the MTN app as i had been getting SMS's of the debir order not going through. Then my account was suspended, i called the customer care line, it was reactivated. I had to aens through proof of payment which i did, then today again my account is suspended. Im so frustrated and honestly wont be taking out any contact with MTN again I have been a loyal customer for years. Why have an automated payment option if you'll constantly suspend my account which i have paid for on time for the past 2 years.