Paying Telkom for service they cant provide

The problem started when I upgraded my adsl speed from 2mgs to 4mgs. Since then the internet is unstable and when I do a speed test is always running below 2mgs and the technician confirmed that there is no 4mgs in Danville.<br> <br> I have sent numerous email without help. One of the Telkom employee who was trying to help me called me to tell me that it is not his department and he has forward my mail to someone who can assist.<br> <br> I tried calling their call centre with no luck. I am paying almost R700 every month for the service I am not getting.