Account doubled since Autopage took over contract

I have been querying the fact that Autopage has been invoicing me nearly double the amount i was billed by Nashua Mobile, when they were in charge of my contract, for the last two weeks (i also contacted A in Jan about the first crazy bill). My Cell C contract is 100 min and 1Gig free p/month. The invoices from Autopage do not reflect my 1 free gig anywhere on the invoice. When i went into the Autopage shop in canal walk on 9 Feb they could not see the 1 free gig and said to call Autopage call centre. I did so and the guy i spoke to said he could not see the 1free gig either - Ref 579689 & Ref 579704 - he only only the ADDITIONAL 1Gig i HAD to add to my contract on 9 feb (due to my crazy bills). i then spoke to Mogadi on 20 Feb (as no one responded to my complaints) who said i had been getting my 1free gig (but couldnt show me). She said she would email me data usage for the last 3m and work out why my bills are so high. But i havent received these workings out. I am so sick of having to follow up and no one can give me a clear answer. I complained on Facebook and at least 8 people are having the same issue. How can Autopage be so pathetic and still exist?! I need answers.