Calls being closed

Since last year I have been struggling with Telkom regarding my slow ADSL connection.<br> When I first got the line, around February 2015, it was syncing at the correct speed.<br> After about a day the line speed dropped by about 1 meg.<br> The line speed remained stable for the rest of the year until about December, when it jumped to the correct speed, 4mbps, again.<br> The line then worked perfectly for about two weeks, but at the start of this year the line speed dropped dramatically; lower than it has ever been.<br> I have logged calls with Telkom via Afrihost, but the first and second calls (reference no. 127BRK290715 and 227BRK070116) were closed without any response from Telkom or improvement in line speed.<br> When I logged a third call (reference no. 4BRK310116, on 31 January), someone from Telkom finally phoned me and we did some tests and tried different ports.<br> The guy from Telkom then stated that there was an issue on the exchange and that a technician would be needed to fix the problem.<br> When I checked today, the newest call was also closed without any action or notification.<br> <br> It is extremely frustrating.