Mrp Overcharge

I have had my account for a year or 2 and it cost R119. I upgraded and still paid R119 for a few months and then all of a sudden my account was over R1000. I barely used that phone. Then apparently i approved an open account. I kept on asking everyone that called me to give an exact quote so i can see what this was for and kept on saying that i never signed for an open account. Before this incident i was charged double some months and sometimes had to leave it there because i could never get through on their phone line. I am still waiting for an amail stating the full account and where i used that much data. I can also never see when they have called because Truecaller also blocks some calls, so they think i rejected to answer. They keep on sending me messages saying it is going to be handed over to blacklists. Ref: MRP ********** . I don't mind paying for my monthly subscription but i will not pay for something i did not use. Since day 1 it was very bad service.