MRP Mobile - company of ******** and *******!

I took a contract with Mr Price Mobile for R135 per month and I received airtime too. I gave the phone for my mother to use, but every time the amount deducted was more then the R135. When I phoned customer service to find out why, there was always a reason, like my mother never hanged up the phone after a phone call, or she used too much data. I paid the account and just prayed for the 2 years to come to an end so I can get rid of them. I phoned them when the contract was almost over and I told them I will not be continuing and they must end the contract after the 24 months was over. That month there was a huge deduction and I took out the sim card. The customer service department told me a stupid story again of my mother running out of airtime and she used data. To my surprise, even more money was deducted from my account even after I took out the sim card! The customer service people could not help me with an explanation and I sent mails with only an acknowledgement of receiving the mail, but never a reply. I warned them I am going to reverse the money back if someone did not contact me and eventually I did reverse the money. It was a desperate attempt to be taken seriously, but nothing happened. I was contacted a year later from a debt collecting agency about an amount of around R600 that MRP Mobile wanted me to pay. I explained to the lady what happened and she phone me back telling me that MRP mobile is willing to give me a discount . I did not have a problem with paying my account, but I felt that MRP Mobile was taking money when they did not provide a service - actually they were *****ing my money! I am still waiting for them to contact me to tell me about the discount amount I am due to pay, but in the meantime another collection agency contacted me now for R800 ! I saw so many bad reviews about MRP Mobile and wish that they can be stopped. MRP Mobile are ******** and only wants money without giving service, why are they allowed to get away with this?