MTN billing department don't know what they are doing!!

MTN cut my services, because they said I short paid on my last statement, even though I paid the exact amount that was on my statement and invoice. I had to call the call center, and hold on there for ever, and then also had to go into a store to sort this out. It turned out MTN sent me the wrong amount on my statement. My contract had expired, and I am now on a month to month basis. I even phoned them to find out why the amount was less than usual, and they told me that my device was paid in full, and I will just pay for data usage now. I told the lady at MTN that I am SO TIRED of MTN making mistakes, and us, the consumers, have to struggle to get their issues sorted out!! I am going to cancel my contract and go on pay as you go! I cannot handle this incompetence!