No explanation for Adsl application for 4months

Three or four months ago i app**** for Adsl from Telkom Menlyn. I was assured that the line would be installed by the 19th of April. That has not happened where i subsequently went to inquire about why i still do not have it after already paying deposit. No one seems to care whether this gets sorted or not as they are all saying that the dont know.if they dont, then who do i go to? I am running a small business where our projects are put on hold because we need high speed internet to produce. The lady whom i inquired with today had so much attitude. I have lost patience