Android in-game help:
Day 1: left support request containing all the player/account data including EA account, Google play email, PlayerID, etc.
Day 5: first response from support asking if account linked with any of Facebook, Google Play or GameCenter.
Day 7: Second reply containing "how to restore mobile lost progress article" which I tried before and got no success.
By the way, there were no any in-game incoming messages about "support team replied" as described in help article from help.ea.com. So you need to open Help menu every time to check for any replies.
