Telkom Bad Service

I signed a 12 month fibre deal with telkom in November 2022, which i pay R499per month. I was suppose to receive a copy of my contract via email but that hasn't happened. I've been to the store but the sales consultant said there is no way i can get a copy because they moved to another company and dont have the old records anywhere. I was billed R847. 38 this month due to a price increase they had. I refuse to pay this amount because the price increase was not explained to me when i signed the contract in the first place. How can they just have a price increase on a fixed contract? The sales consultants are useless in assisting me in obtaining a copy of my contract or assisting me in canceling my contract. Unacceptable service!