INCORRECT BILLING ON A CAPPED LINE: NO FEEDBACK

I logged a complaint regarding my data usage that was supposed to be a capped line as per my contract. I have been double billed. I then request for a usage report which I was advised to pay for. Why should I be inconvenienced when my request was not followed through. I have not had feedback ,however this morning I get a payment reminder of the amount which I refuse to pay. I requested that this line be capped. Who gave MTN permission to uncap this line. Nobody is interested in assisting me as a client and this frustrates me. The lack of interest within this operation scares me. I have been a MTN client for years and I have two contracts with them. I wish another service provider could assist me in porting my lines. I have had enough of their lack of concern towards customers. I am paying monthly for a ****py service being rendered. <br> AND STILL I AWAIT A RESPONSE INSTEAD I GET A REMINDER OF AN OVERDUE AMOUNT WHICH I AM DISPUTING...