Bad Service

I am really getting fed up and frustrated with the service of this company like so many others. I currently have a 4meg ADSL line installed at my home was working fine without problems for more than a year. About 3 months ago i started experiencing bad speed,disconnections and overall bad internet from my line. Phoned Telkom for resets even had a technician come out with no luck. In this week i received a call from a technician stating that my line is syncing at 2.5mbps and not the usual 3.6 to 3.8 and might be that my line is being managed by the ASSIA system,WHY?? it was working fine so the problem is at Telkoms end and not mine.A Friend of mine not even staying a km from me has no problems and is also on a 4mbps line amd dont give me the up to $mbps nonsense,it was working perfectly,syncing at between 3.4 and 3.8 mbps so thats just nonsense,fix my line immediately!!!! Or like i told the technician,i will cancel and thats a promise.