Incompetence Service with Telkom

I joined Telkom in October last year, a week later I went to complain in their Telkom stores that the systems I use at work were not compactible and I was not able to work while working from home, I was advised that the IT or system relation department will call to assist further, till date, they are still investigating the matter, been going to their Southgate offices, I have not been assisted and I called their call Centre in December asking they confirm my banking details because they have been taking on the wrong account and instead of deducting on the 27 of every month, they deducted on the 15th of Dec( I had unnecessary bank chargers) due to their incompetence.

Now I want to cancel my account with them but they tell me I have to pay for penalties, which is unfair as I advise a week after taking their router that it was not working.

Telkom's service is pathetic.