Paying the bill but still no service

Good day<br> <br> We have an ISDN line faults for the past 6 months. Telkom has sent out a few technician to fix the problem. The technicians always leave without saying anything (No signing of a job card). After they have left, our phones stop working completely. ALL 7 ISDN LINES!!!! Our business is dead in the water without phones. The next day, the support ticket has been closed and reported as resolved. Our business is still without phones. <br> <br> I have logged countless support ticket. Sometimes waiting a week or more for a technician to comes out. Nothing is ever fix. Only more problems are created. I have heard every excuse in the book. We have even threatened to cancel all of our line because the service is simply unavailable. <br> <br> I suppose it is the lack of professional technician that know what they are doing.