Damage to My Equipment

Hi,

I moved into a home (renting) where Xfinity had previously wired up the premises. As Comcast was the only realistically available internet provider of sufficient speed for my needs, I called and received a router by mail to hook up to the existing wiring. I used surge protectors and a UPS on all of the essential equipment connected, so that there was ground/surge protection on the power side. At the time I assumed Comcast had properly grounded the connection from the cable/coax side as this is industry standard practice. Unfortunately, during the first big storm we had at the location, this was proven not to be the case - everything connected to the Comcast/Xfinity equipment on the coax/network side was damaged. My personal router now only functions as a WiFi access point (all of the LAN network connections are fried so you can only WiFi into it; none of the physical network connections function any longer) after this event and my NAS (storage controller) was completely disabled and no longer turns on. I am attempting to at least have the latter repaired to the best of my ability, but so far the repair service has had no luck reviving it.

Since then the Comcast/Xfinity router has been dropping to an extremely slow (0.1mbps according to the Comcast speed test) connection rate between 1-3 times a day, at which point the router becomes very hot. This indicates to me, at least, that the Comcast router also incurred some damage while letting through that surge on the coax side that damaged my personal equipment. I called Comcast and the technician they sent confirmed that the connection wasn't properly connected to ground (according to him this has now been remedied). They are going to follow up as they said there were also some signal irregularities where the connection comes off the pole and into the home they want to address. Whether this is related to the surge that damaged my equipment, I couldn't say. They also replaced the Comcast router with a new one.

I would like to file a damage claim for the equipment destroyed/damaged by this power surge, as the lack of proper grounding on the coax/Comcast side seems to be responsible for it. How would I go about doing that?

Thanks.