I believe I was scammed can someone help??

My 10 year old son was on his Playstation4 when he was contacted by email regarding a MUT reward.  The person contacting him was named EaMutRichard requesting that he sign into his EA sports account to receive his reward I was very skeptical of the whole thing, but it seemed legit (need to state that I am clueless when it comes to video games) so I told him to sign into the account but don't give any personal information etc... which he did not.  All he did was sign into his EA account and was told in 24 hours he would receive his reward by code. When he logged onto his account this morning his 2 best players were missing and there was no rewards code!!! Can we get those back or are we just at a loss he is devastated he worked so hard to earn those players!

Thank you,

Kari