Disregarding my upgrade choice

So Vodacom just billed me almost R1300 on a contract that was upgraded from Blackberry to a Topup contract where neither contract can accumulate data costs. I have spent countless hours on the phone and then they just send an sms saying I am wrong and they are right, no phone call so I need to spend more of my time waiting for the new agent to try and figure out what is going on. I have another 4 numbers with vodacom and battled to get an upgrade done. One number took two months to upgrade as they just reverse the upgrade twice but still bill me for the upgrade and when I want to enquire about the upgrade I get told I must pay for the upgrade before they can assist me! Really??? Vodacom owes me the data costs incurred on the topup contract and they owe me two months on my contract as well. Phone ME for crying out loud!