No service at mtn

I have been with MTN for more than 5 years. The was good then. Last I renew my contract and took a new phone. Fine. For as long as I could remember I have been paying via pay plus which is a payment coming directly from my salary. I never had any issues with this mode of payment. Came May 2020, my statement showed that I owed over a thousand Rands. I was shocked were the errears were coming from. I went to the one branch at Southgate, the lady I owe three months, I was like hold on I owe how many months? That can not be true. She well thats what is showing and you need to pay it. I went home got the proof of payments and decided to go to another branch at Southgate to give them the proof of payments. The guy who helped tried the client services, could no go through. All this happening after I called I don't know how many times and even send an email. Got back an email about two weeks later asking me to send my details, no phone call nothing. Gave the details and got another email for more details no phone call nothing. I waited, I called until I got another statement tgat said I owe over two thousand Rands. Now I have had it with MTN that is why I am writing to let people know that there is no service when you have issues but believe say you buying a new phone. You are treated like a king or queen. I am so disappointed it's not even funny. Payment from March to May are no where to be found. I am not going to answer any emails or give anyone my details on line. I need to phone and make sure my account is put right or don't bother phoning me. Joyce