I was sold a contract I can use. They wont fix it.

I renewed my data contract at the beginning of Sept. I was receiving ridiculous bills and was advised to go onto top-up. I tried this previously but this was a mess because i have dual sims on the contract. Hendrik advises this would not be a problem this time round so I sign up. Contract conversion comes into effect mid-September and I find my sim cards don't work. I give benefit of doubt and give more time for the sims to activate. Nothing happens. I call Autopage. Surprise - I get advised that multiple sims don't work on a top-up contract. OK then, I was sold a product I cannot use - I ask for the contract to be cancelled or the problem with my sims to be resolved. The operator will elevate the matter. She also says I must take this up with the branch where I took out the contract but she is not clear on what they would do for me. I tell her I will give them a week to respond. No response comes through. I go to the branch this weekend. Hendrik is not there. I speak with someone else. Now its common knowledge that you cant have a dual sim data contract on top-up BUT I can cancel the contract for R1500 if i want...!!! Are you serious? I havent been able to use it