When are we going to get what we pay for!?

My contract with Telkom is for a 4 Mbps ADSL service. Since January I have been getting anything from .01 Mbps to the contracted speed when I complain and they re-initialize the server port. And when the port is re-initialized, the improved speed usually lasts about 30 minutes. This is no longer a joke, one cannot work under these circumstances. The big joke is, without blushing, they ask whether they could upgrade my service to 10 Mbps!!!!! When is someone going to look into this fiasco? Are we having to do with another institution that has allowed itself to fall behind the technological evolution and we are now having to pay for their inefficiencies? Is there another alternative? Please help.