I had that issue once upon a time with some utility company. Tearing up my landscaping, broke my fence. I couldn't get through to anyone at the company who was capable of correcting matters. Talking to the workers myself proved a waste of effort, and they were so rude about it too. So I called up my trusty partners from Heckler & Koch. We all had a little sit down discussion about respecting other people's property and how, just in case showing that respect slips their mind, they should avoid coming back ever again. That was the last we ever bothered with it.
There is also the law firm of Smith and Wesson. They have been efectively dealing with this sort of thing for gegenerations.
You could call on Mr. Glock. He's German, but don't worry about his accent. He speaks many languages and everybody usually understands him well.
... Lol. The things you find amusing at 3 in the morning when you can't sleep.
On a more serious note though, go to county records and find the easement document. There may also be something in your property deed. I think verifying the easmemt is a good first place to start. Make sure whoever is advising you stays aware that this is not a public utility, but private, a cable company. Therefore provisions under the Texas Utility Code do not apply. There are some various other laws that would, but generally, easements are governed by the verbiage in easement document.
Some established case law if you like to read such things:
"An easement is a non-possessory interest in another’s property that authorizes the holder to use that property for a particular purpose." Marcus Cable Assocs., L.P. v. Krohn, 90 S.W.3d 697, 700 (Tex. 2002).
"An easement does not convey the property itself." (Merely use of. Access is another matter.) Lakeside Launches, Inc. v. Austin Yacht Club, Inc., 750 S.W.2d 868, 871 (Tex. App.—Austin 1988, writ denied).
"A grant or reservation of an easement in general terms implies a grant of unlimited reasonable use such as is reasonably necessary and convenient and as little burdensome as possible to the servient
owner.” Coleman v. Forister, 514 S.W.2d 899, 903 (Tex. 1974).
Milt Colegrove would be a good person to ask. I don't know if he handles this himself, but he could at least point you un the right direction. His number is listed on the Sponsors page.