Internet Line issues

I have a 4mbps Telkom internet line but only receive about 1.8mbps if I'm lucky. For the past 5 days now I have had issues with my slow internet line. in which I have phoned Telkom three times to try and resolve this issue, every time spending around 30 minutes waiting only to get the phone dropped, every time. I have also been in contact with them on facebook and every single time I get a reply apologizing and telling me that the issue will be seen to. It is the end of business on day 5 and after wasting about R150 airtime and complaining on facebook like a child, with no satisfaction that I resort to this method. Why is this always the case with Telkom? Why do I have to struggle to receive a service that Telkom has no issue taking my monthly payment for? Why do I have to resort to sites like HelloPeter just to get some proper help with a situation? I don't want to do this, I dont want to drag Telkoms name through the mud, but my hand is forced. Come on guys, this is a business we are dealing with here, can we have some professionalism?