Telkom is a ****!!!

I upgraded my contract and the sales person told me that I'd pay only 1 more time for the previous phone contract. My new bill was supposed to be R350 pm.... The first month I paid R1000 (shocked but kept quite) and now I have to pay R845 ....how the hell does this work for a phone worth R350 pm? And no, I only used extra R120 airtime, meaning my bill for this month should R470!!! The agent told me I'm being charged migration fee twice as telkom decided to divide it by 2 what a joke you guys...I'm so mad. Another agent I spoke to had a different story.... the sales person also could not explain why that was the case when I went back to shop! I didnt sign up for this ... I'm so disappointed! I did not budget for any of this!! that's a lot of money I don't have... someone please help me! I will never recommend telkom to anyone