WRONG PEOPLE WORKING AT MTN - Just there for the pay check!

I thought MTN was an up-and-coming company. I have had so many poor experiences with MTN, l could write a book. The latest episode is that l was getting told they are handing me over for account that's in arrears. 2 months ago, l was going through my statement, and it said l still owed R737. I had paid R300 a week before (my payment each month is for R260). I paid the R737 thinking l am in a credit. Oh no, now l am getting messages saying l owe them R1890 and that they are handing me over. When you go into the shop (l drive 54kms) to enquire about why the MiFi is not connecting. They take your phone, lounge back and l don't know what they are doing with my phone because not a word is being said to me. I walk out with no idea what they did on my phone and still no MiFi. The Consultants friends are sitting on those couches where they can see the consultant's computer and it's just one big party. What is going on? Why is there no-one checking?