Appaulling service from VOX nocomms

Logged a ticket on 3rd of June regarding connectivity issues, only got a call from the technician on the 10th. He could not assist at that time, because we cannot afford the line to drop during the day. He promised to call me back after 5, which never happened. My wife phoned the next day, and again she was promised to be called back. Once again nothing. She called once again and they promised that they will look into the issue and also provide an outage report for the 3rd, again, no surprise, but nothing received. Logged another ticket last night, to let them know about my unhappines and sent them a speed test report. Again, still nothing done. I am sending reports now on a regular basis during the day, and they still does not respond. We are paying for a 100Mbs line, and getting less than 0.5Mbs. Absolutely appalling. I have never had this pathetic service from VOX, time to switch to another service provider - even if I am with them since they came into existance.