Incorrect additional charges since upgrade

In 2014 November I upgraded my contract with Autopage to a R200.00 top up contract, Firstly my migration to the upgrade did not take place. So I was being charged my old contract fees as well as new contract fees. I escalated the complaint to the store manager Bilal who advised he would sort this out accordingly and all adjustments will be made . This continued for 3 months and then I was refunded some of the amounts back. However they stilled continued to bill me incorrectly and charging me for itemised billing on a top up contract, Bringing this to Bilal attention he promised to sort out but still the problem persists till now which is 8 months later. The only correct bill I received was in May, every other bill was incorrect. I have now just received my bill for June and the itemised bill they rectified in May has now been disguised in other amounts to bring the bill back to the amount it was before the itemised billing was removed. This is something I can no longer accept. I have been more than patient. They rob their customers and never deliver on their promises . 8 months for an issue like this is ridiculous. I will take this further with the Ombudsman