Bad service and high price increase for an existing contract

I took a contract with telkom for fibre deal of uncapped for r399, the contract was for 24 months an then a year later the amount was increased to r448, i queried then i was told the was a price increase and again a year later the price was increased to r499, i queried and my email was ignored again until i disputed the debit order and now im in areas and charged for the dispute, i queried and called several times triying to cancel the contract, iv been given options and numbers but everytime i cal i get transfered or been told to cal the other number, i recieved a bad service and feel im been charged for areas where else i queried before debit date without any assistance, iv been ignored and when i call back i use my airtime just to be send back and forth for cancelation