Sprinkler system Cut during cable burial...

I had Cox bury my cable in my yard, and after many times of telling them I had sprinklers, they cut the line anyway. Now they are refusing to come out and fix...

What are my options? 

I understand COX doesn't actually fix this problem, but they said they have to come out and verify they cut it. Then they will determine what it will cost to fix. I will then have to get it fixed and supply them with a receipt.

The problem is they won't get a tech out here to determine if they did it. I called and put in a ticket, then 10 days later called about the ticket, which I was told had been closed and or resolved. Now they opened another ticket for the same thing again.