Unable to fix a technical problem

It comes to no surprise the unprofessional and ********* behaviour of TELKOM. Is been more than a month that I have reported a fault on my voice line and till to date TELKOM is been unable to troubleshoot the problem. Every technician that comes to my home to attempt to fix the problem does not have any idea how to proceed and identify where the problem is. Firstly their call centre is impossible to get through as they claim 'that they are receiving a high volume of calls' therefore will be taking long to attend to my issue. Is amazing that they are receiving such high call volume even at 2 or 3 or 4 am in the morning. Surely TELKOM's management are playing with the public's intelligence. I had a technician come to my home today (2016-03-05) and after spending about 45 minutes trying to identify where the problem is he decided that he will leave to go back to TELKOM's workshop in search of a cable and return within 30 minutes. Until now that the time is 8h35 am the next day he is still on his way back. But guess what if I had miss paying my rental for one (1) day they will have immediately action and interrupt my line for late payment. BRAVO TELKOM you should be very proud!!