Stolen orange cable

A burial service tech came in my yard, claim to bury an orange line in my yard. Instead , he disconnects the orange cable , reconnects the black cable I'm having an issue with. He goes to his truck sits there for awhile. Shuts his door and leaves. I go looking at my cameras to check his work and witness him rolling up the new cord and carrying it to his truck . Then I notice the quality of my signal drop.