ADSL no connection

I am currently paying Telkom for 10mbps adsl line, after experiencing speeds less than 1mbps for a full week I called technical support. Managed to get through on my 4th try. The technician attempted a port optimisation, my adsl line now will not connect at all thanks to this attempted fix. I was given a reference number which has had the same status for the past 2 days. I don't receive feedback, the online system has no details, I can't get through to customer support again, I tried 8 times today holding on average 10 mins per attempt before hanging up. I have no idea how to begin getting a service I am apparently paying for.