INCORRECT CALCULATIONS

I upgraded & enlarged my contract 29 June 2015 and had to receive the new contract immediately but had to fight to receive the service, after 2 mnths my phone got ******. The clerk upgrading my contract specifically confirmed on my request that the insurance is R137 for my device. As I went into the store to submit the claim in September (after my September debit order which was the correct amount for the new contract), the clerk there found out that Autopage did no administration for the insurance from the old contract to the new and only still allocated about R43 towards the insurance - We spoke to the Ins. dep and the lady confirmed that they can handle claim but I will have to back pay months not correctly debited, the difference being +/- R95 p.m. + R650 excess - July & Aug = R190 + R650 = R840. Autopage took R185 in Oct and R326 in Nov. This = R511 leaving R329. Normal debit R790, Autopage wanted R1440 from me now, R650 more, I only owe R329 meaning debit order had to be R1119. I pd R790 and emailed this to service requesting to recalculate, AP cut me anyway and all refers to statement. I demand immediate reconnection & recalculation. I will pay arrears once billed correct!