Pathetic customer service

About a year ago we signed up for wifi and the operator helping us booked a double contract without my consent. Telkom has been deducting double the money I eventually stopped paying the account. Telkom has called me and promised me that they will fix the problem but it's been a year and NOTHING HAS BEEN DONE every time I call I speak to a new agent and there is no records all I get is how sorry telkom is. Telkom was the worst mistake I've ever made