MTN...I would not give you a single star if I had a choice

There is a glitch in the system...I would just love to know when this problem will be sorted out....for 6months I have been battling to have banking details changed... I can not even change it on the app. I have paid in store in advance...now my accounts shows I am in Arrears....your F/Up system is very quick to cut the line. I am so fed up with MTN