Calls and hangs up. I would not purchase anything from a company that uses robo callers then disconnects. Quit calling idiots. May pay them a visit being they're only 25 minutes away, they won't like it either!
Same thing happening with me. They call and no one says anything. I guess they want you to call them back. I add them to my AUTOREJECT list. It seems these same companies buy several #s and call you from different area codes. Best thing to do is place them on your autoreject if you have an android / iphone. I've submitted a complaint to FCC already, but it doesn't seem to work since they are probably bouncing your #'s around to other companies.