Unreliable Telkom

On the 29th September while I was in the middle of an interview, I lost wifi connection, I taught this was due to load shedding however that was not the case. Then I thought the problem may be my router, again this was not the case after I did some troubleshooting. The thought maybe the sim card was damaged, however again this was not the case as I went to a mobile Telkom stand at Heidelberg Mall and I was told my number is not active, meaning it was deactivated. They helped me to get InTouch with someone from Telkom on the phone and that person confirmed that indeed my number was cancelled and He does not know why as the system does not indicate reason for cancellation. He promised me that he will investigate and email me feedback, to no avail. I work from home, so I obviously had to make other plans to stay connected as Telkom clearly failed me....Now I receive an invoice? When was my number activated? I will like my number to remain deactivated as I will not pay for something I did not use.