i`m afraid there is no way to change server, the only options are

1, leave for 70 days without logging in and join again at the same time via facebook

2, open a new facebook account together and start again and manage two team`s


with the transfer market it`s all up in the air as there are different market`s, 1 market (old|) has 120 player at most with 1 to 3 hrs to bid for player`s and the 2nd (new) is 20 to 25 player`s on market for 30 to 40 mins which is useless, read the Bring back old transfer market for better info