Worst company on the planet

Once again telkom has made we question why I use them. Last year I fought so hard and logged so many faults to have my 10mb line fixed and syncing higher than 3 megs. Today I find out they have changed my line to a 4mb line without my consent. After spending half an hour on hold I was told I need to phone back and talk to sales and spend another hour on the phone trying to get hold of them. I was refused every request to have them call me back. I was refused any information on who changed my account without my knowledge and again told to phone back. In the last year I have spent hour upon hour on the phone with telkom to no avail. Now I am expected to repeat the entire process all over again. I need answers or I will be closing my account for good. I am sick to death of this company and pray for the day viable competition comes in.