Xfinity cut our Invisible Fence

Last week, Xfinity was out (while we weren't home) to bury a cable they installed last November. In the process, they cut our Invisible Fence. Yesterday, Invisible Fence repaired the broken line, at a cost to me of $237. It seems Xfinity should be responsible for this. I can provide the Invisible Fence invoice, although I see no ability to upload it in this forum.