ADSL upstream/Unavailable internet

I have used Telkom for 3 years now and suddenly 3 weeks ago my upstream speed dropped from 512kbps to 96kbps and now it is 64kbps. I have logged the issue vie telephone, the sent a guy but he didn't fix the problem, I logged the fault on their site and after 2 weeks nothing. I speedtested the lne with my afrihost(better but still bad) and telkom accounts. It was back to normal for 8 hours on 11/11/2015 and the next day our phone lie was down for an hour and then the internet speed was back to 64kbps. I am extremely unhappy about this and would greatly appreciate an answer to my problem and a fix. The problem is not on my side. I have tested it on my cellphone/laptop/desktop and without doing something else it got better for a day as stated above