MTN is a ****mer and constantly has hidden fees and bill increases

Trash Company, ****mers. When I got my contract in late November they said I would only pay R399. Then came Jan and the invoice said I owed R749. When I enquired they said it is pro-rata fees(hidden fees). Now it is feb and they just sent me a bill increase and an invoice that says I owe R429. So ever since I took the contract that specified that I would be paying R399 each month, I have always paid more. either they don't train their customer service staff adequately or they are just plain ****s and ****mers. I should have litigation against you.