Wrong billing

Took a contract with autopage in May 2015, have been paying R181 every month as the contract as per my understanding was topup (which was, as when the airtime and data were done, i would have to buy), in December they charged mye about R730 and when queried it was said the contract was open, and not capped. I couldnt understand as I never gave anyone the authority to change my contract, but it was said it was like that form the begin (LIES...than how was it that I was paying the same amount for 7/8 months???) I kept reversing the debit order and paying the R181 and mind you they have since blocked the sim card. I have numerous times sent and email, and will always get an emial saying my case is open, and same day, it would say the case is closed. No one bothered to call me regarding this, I have to call them and still get no help. <br> <br> SOMEONE FROM AUTOPAGE PLEASE CALL ME TO RESOLVE THIS ISSUE PLEASE!!!<br> <br> And I havent been getting any invoice or billing since October