Electrical issues from internet install

Hello, I recently upgraded my wifi resulting in the modem being replaced with a hub. The technician asked if he could screw the mount plates onto the wall for the hub and I agreed, as it was recommended not to be sitting on the floor.

After the install it was noticed that the technician also put on a new electrical plate for the hub, due to this plate install (that I was not told was going to occur) the electrical power was lost from another dedicated outlet for my heat source for the room.

The plate from the non working outlet is now also falling off and it was working and secure immediately prior to the install of the hub by the technician.

I do not know why the technician cut my power to the outlet and was not told this would happen as I would have had the hub installed near another existing outlet. I now need power reestablished to the outlet as I need the heat working in this room (it's currently -30). What are the steps for Telus to fix what their technician did here?