They know you moved. But since they think you’re a Democrat, they’re saying you should vote anyway even if you don’t live in the district.
I thought that, too, the first time we got a phone call. It was for a Democrat candidate. Thing is, over the years, the Republicans call, too. We even get calls on “issues”! We think that what happened was that in the first months after our move, the phone company left a recording that gave our new phone number. Someone from a political persuasion entered that number into the database, not checking the area code. It tells me that they really don’t care if they harass you for the rest of your life. If we continue to get phone calls for Ohio voting, I’m going to have to take more serious steps. I think I’ve been too patient.