Poor service/unfair black-listing

On the 13th August 2017 i received a call from a cell c agent offering me a contract phone, she said that the package will be 2 sim cards one for data and the other for voice calls and the phone which will be a package and the installment would be R 150.00 per month. From that information as provided by the agent i then agreed to take the contract considering the terms provided. In mid-august i then received a text message indicating that i must pay R 495.00. I then called to enquire why the amount was so high, they then said that i will be paying 2 installment per month, R90 and R150 for two packages, i then queried that to my knowledge i was not aware of the two separate contracts but expecting to pay for one installment which is R150 per month as it was explained to me that the product they sold me was one package and not 2 different packages, to my shock when i queried this the lady i spoke over the phone said to me "why osa innaganne mama", meaning why don't you think for yourself mama. I then asked her that it is their duty to give full information when selling the product instead of giving such terrible service because now the sale had been concluded and therefore they do not care about customer satisfaction. I then requested a voice recording where the agent had told me about the two different packages, i waited for the recording and to date no recording was sent through. I further expressed that it was unfair for them to expect me to pay extra money while i am not satisfied as a customer, and that i would be better satisfied if i received the recordings. while i requested the recordings with no success, cell c goes and black-list me. no communication and no feedback as promised. I went to one of their branch in Westgate mall and yet again the lady i found there just said to me sorry on behalf of the agent who called me but did absolutely nothing to try resolve the issue for me. I am not satisfied as a customer with this horrible service. i told them that i am not refusing to pay the contract i agreed to, however the product was falsely sold to me as the information that its two separate package was hidden then i would be satisfied if i would listen to the recordings. after that if the recording proves that full information was provided, then i will pay as per agreement after being removed from the black-list.