I had to reinstall the app on my iPad. I had my team linked to my facebook account. I am unable to get my team back when I signed back in to Madden and Facebook after reinstalling the app. Spent a lot of money and time on the team and no one at EA will help.
My only answer relates to an ipad... Not sure of android or even iPhone solutions... But this works for me on 3 occasions now... deleted app from iPad homescreen (not from App Store) re-download from App Store, once loaded open app.. And when game homescreen comes up tap login via Facebook in the top left hand corner and then click on madden mobile link/page on Facebook...and my progress is restored... Hope this helps