Not sure I understand you completely, with different accounts and/or there's more than one farm. This should explain how to play farm on a new android device.
http://supercell.helpshift.com/a/hay...n-a-new-device
As far as I know, it's no longer possible for players to change the Fb account farm is connected to, maybe the same is for G+, if that's the Google account you mention as "new".
This is "only" a part of the forum for players, and there's no real contact to support here. I think it might be best for you to contact support from the game about this, and be very patient for an answer, it can take time.