Babylist accidentally sent us an UPPABaby Vista stroller

Came home today to a box on the porch—an UPPAbaby vista. I was beyond confused as we were registered for the Cybex Gazelle. Checked the shipping label and it was from Babylist(where we are registered) but no name and not shown in our “purchased gifts” section (again we weren’t even registered for it. I contacted their customer service and I guess it was a mistake? They sent us this instead of a high chair someone had ordered us.

Idk what to do now. Apparently in the US if something is addressed to you, you can keep it? They are asking me to return it. Help!