Telkom unwilling to upgrade useless lines

I have been a loyal paying customer of Telkom for the past 5 years. I live in Edelweiss Springs and for the past 3 months I have been struggling with Ping on the line during evenings. At first I though the account is being throttled, but it hasn't. Telkom has sent out technicians to come and test and apparently there is too much traffic on the exchange... meaning too many people online during the evenings for the 2MB/s infrastructure to support. And they told me that Telkom will not upgrade the system to a 4MB/s infrastructure only because I am having problems. <br> I am very dependent on internet and cannot work properly with this issue. I am forced to use 3G which costs way more than ADSL. Please can someone help us get this problem sorted? It is urgent please.