The house I rent is being foreclosed/in a short sale, who do I pay rent to?

I rent a house in Minneapolis, MN. My landlord was foreclosed on and now Freddie Mac has been in contact with us, the renters, for some reason. They claim we pay a company rent through them, but our old landlord says we still pay him. He says he still owns it and it is in a short sale and Freddie Mac just needs to get off their *** and do the paperwork. Both sides are saying different things, so any advice on who to listen to?