Poor internet service

First week of December 2015 I contacted BSIT about a sudden signal loss, I was informed that it could be due to upgrades that took place on the tower<br> During December I called a few times and got help from Pam, stating that systems were new, and new hardware must be installed at my home, this would be done on 28th December as no one knows how to do it, and the supplier will only be open around 28th.<br> The Techies tried to install a new transmitter unit, with no success, they could not \calibrate"the signal"