don't bother called EA up for this i had it about 2 weeks ago they will just palm you off with some excuse about server maintenace i ended up in an argument over the phone with the arogant EA worker on the other end just becuase he kept saying sir ive heard this already about 50 times today =(
i was like when how the hell was i supposed to know so i hung up and rang back got a different staff member and he was much more helpful he said it can last a minimum of 10 hours and go up from there and if it still persists after a day or two give them a call =)
hope you get your maps back