Inconsistent internet access

I live in Agassiz, B.C. This problem began the same night the wild fires in Yale started a few weeks ago. Our internet access all of a sudden is intermittent and goes off for no reason which also affects the TV which is new and was part of the internet package from Telus. A few times the disconnection has been brief and the TV will connect again on its own but to date I have spent over two hours on the phone trying to get help. I've rebooted the wall box multiple times, have gone through trouble shooting with Telus call centre agents in other countries. Two weeks ago it seemed to rectify itself but now it's down again - repeatedly. I reboot the box and it comes back up again for a bit but then disconnects. Is there a problem with the actual wall box?? The installation tech said the wifi should work in a house up to 4000 sq.ft. and mine is smaller so there shouldn't be a problem but in retrospect I should've taken him up on his offer to hard wire. I am fed up with this. Fibre optic seems to be unreliable and I am not satisfied with having to tether to my cell phone on a continual basis. I work at home and I do not want to have to spend more useless hours on the phone. I am also told that I will be charged a service fee of at least $200 to have a technician attend if the problem is my fault which I can't see because I haven't done anything to the Telus equipment which was just installed late March of this year. Is anyone else out there having the same problem? HELP!!