Incorrect billing

I upgraded 2 months earlier and requested for a top again - I received R150000.00 worth of airtime which I was not aware come from the contract. I contacted them and they removed the amouunt of airtime. After a month passed I received billing statement of R2981.00 plus the ususal monthly amount. After several calls and emails of which I have copies. They responded to the emails with my input and siad the case is closed.<br> I refuse to pay the R2981.00 but is paying my monthly billing and my phone is suspended. I will go to \off my trolley "and put my query and the service I have recieved in all the newpapers if I do not ge a response."""