Pathetic how AUTOPAGE *****s money from clients

For the past 5 weeks I have been struggling with Altech Autopage with a dispute on my billing and cellphone account. I have taken the matter up with their Somerset West Branch and have had no satisfactory attention to the matter or any eagerness to get it resolved. Since December 2014 until May 2015 I have been billed monthly for International Roaming, yet I have never been out of the country to activate the international roaming - when I showed this to Altech Autopage in Black and White on my detailed itemized billing, they claimed it must be a mistake, but I am still left with the large amount of costs that was incurred, according to my billing - I have not used their service in any other way for the past 4 months than the previous 4 years and have never had these ridiculously high bills - now I have no choice but to pay an account of more than R5000.00 otherwise they simply suspend my service. I have a data warning on my phone and never once was I warned that I have reached a cap or limit on my phone - Every month since December the charges went up gradually, until last month when it was more than R2600.00 and then this month R4400.00 - I logged 4 complaints and 0 response