ADSL and phone disconnected for no reason

On Tuesday, 12 September at around 11:30 AM I saw an OpenServe technician opening the hatch in the ground in front of my house to work on the phone lines. At first I thought nothing of it. I figured it might just be routine maintenance. Suddenly, my Internet and phone line stopped working completely, almost as if something was disconnected. The OpenServe technician drove away and I never saw him again. I have since been without Internet, a phone, or an explanation as to why suddenly everything stopped working directly after I saw the technician in front of my house. I work from home which means I rely quite heavily on having a working Internet connection. I don't understand how OpenServe/Telkom thinks they can just disconnect someone without it affecting anyone. Afterwards, I logged a fault and a technician was scheduled to arrive the following day. Of course I knew nothing about this as no one phoned me beforehand as I requested. I work during the day and I can't stay at home to wait for a technician to arrive. This should be common sense. I would like to know exactly what the certain technician did on 12 September which made me lose connection and why there was no communication to me about anything. There must have been a reason why he was here or a job of some sort must have been scheduled...