slow internet

Since Saturday my Iburst has been half the speed. I cannot stream anything anymore. I have a 2 meg modem and only have 1 meg speed. After the 2 times I contacted the call centre, they keep on telling me, it is a problem, and they are working on it. I also use it to work from home, and cannot access my emails or do anything. It's like there is no urgency to fix this problem for them.