Very Bad Service

I made a payment in April 2020 via Bank deposit. Since then MTN has frozen my account every second week. I went to our MTN branch to sort it out and proof that payment was made, unfortunately due to incompetince I had to make the payment again. Unfortunately my account is frozen weekly and I have to go to the branch to unlock it. This is taken up a lot of my time. Please let me know if I rather have to cancel my account with you, because of the effort it takes for you to do your job.

My phone number: ***

Your prompt response will be much appreciated