Disappointed

I am so so disappointed as this issue has been going on for over a year. I have sent proof to show that the router was never delivered for wifi and telkom keep debiting me. I have gone into their branch to try sort it out, phoned, emailed, twittered and keep getting told that the matter will be attended to and yet today I was debited again. Please if anyone has any advice on how to assist I would greatly appreciate it.