Incorrect information regarding billing.

I was sold a package last year August, and according to the call center agent, my monthly bill would amount to less than R200. I was informed that due to pro-rata, the first bill would be around R400. To my shock, i have been billed R695. i then called in the beginning of December to cancel the contract. i was still billed that amount in January, i reversed it, thinking someone would call me. Reference number ********** 4, where i was informed that my cancellation was received and being actioned. On Saturday 19th January, i called the call center and a very rude Thembeka Mweza, said the team leader Lungi Cele will call me and to date, i have not received such a call and was debited R995.54 on Saturday. I'm pleading that this contract be cancelled. i'm prepared to pay penalty.