UPGRADE COMPLAIN

I am autopage customer for years now, and it was the first time i did an upgrade telephonical, i told the guy who was helping me with upgrade, to continue with the package that i was on, in the month of March, i received statement with a high amount, and i called autopage to find out why, and they told me that i am on an open line contract, and i told the consultant i spoke to that i need the same contract i was on previous years, and she told me that she changed to top up 100 and i will be paying R675.00 for both my contract, and ref no was 629567, and in the month of april, may , june, jul, was still receiveng statement with high bill, i spoke to different consultants, and nobody is helping me, i need to know what next to do, consultant i did an upgrade with, was Sheldon Holker