Terrible Internet Service!!!

My ISP account has been unacceptably slow for a very long time. Does anyone at Telkom even care? I don't think so!!! I even upgraded my line from a 2 mbps to a 4 mbps line hoping that this would solve the problem, guess what? STILL AS SLOW AS EVER!!!!! The line seems fine, it is the terrible ISP account. When I change the account to an Afrihost account, everything works fine, decent speed, no real connection issues except there is a high latency (ping). Once I switch back to my Telkom ISP account, slower than a telephone agent at a Telkom call centre! And that is saying a lot!!! Some devices cannot access the internet at all. You cannot even watch a 144k video on YouTube without endless buffering. Please can someone who actually has some sort of passion for their job, or for Telkom help sort this out. This has been going on for months and months with promises that you will \investigate". """