Internet Speed not stable

I'm not happy with the service I receive from Telkom, every month I have to phone to complain about speed on my connection.<br> <br> I've got a supposed 2Mbps line but when tested it only reaches 1.50Mbps if I'm lucky, last week was the fisrt time it was close to 2 Mbps(1.70Mbps), I pay for a 2M line I want the service of a 2M line.<br> <br> Tested last night, shocking surprise it was only 0.55Mbps, now I have to phone again to complain about speed.<br> <br> This is unacceptable. <br> <br> Will something happen, most probably not .