line dead while busy with call centre

I reported a slow adsl and agent told me to take adsl line out of router and then put it back. When i have done that she is gone and my line dead. I tried with my cellphone and was cut off after speaking with an agent. Third time that I phone they said they will test the line, and then said it is faulty. But it seems very strange. If that is the result if one takes out the line from the router it is also their fault because they told me to do that. How long will it take them to get my line in a working again after this fault report. So sorry I phoned the call centre now I have not a slow adsl but no phone or adsl!!