Deb, it sounds like you have taken the appropriate steps, but make sure to update your leases moving forward to address situations like this.
It is your property, so unless your attorney says otherwise, you should be able to remove the Dish. I had this happen at one of my properties and I was furious, but in speaking to my tenant and offering them the ability to place a dish in the ground behind their unit, we were able to amicably come to a solution.
Best of luck.
Sep 18, 2012