How many times should I call your customer service helpline

I have been experiencing downtime since the installation of your price lock decoder. When I called first three weeks ago, I was taken to a troubleshooting exercise. When that did not work, I was told to go to the walk in center. When I get to the walk in center, they found nothing wrong with the decoder and I was asked to call your call center again.

I called your customer care line and I was told that the technician is on his way to fix the problem. Two days later, no technician.