Transfer a game from an account to another

After various issues with the transfer of my games from Origin to EA App, I am now facing a new problem (I already contact the EA Assistance and they told me to post something here to inform other gamers). 

My story :

I wanted to associate my Google account to my EA account to facilitate the log in. Since I had log in issues a few years ago, I have two EA accounts and, obviously, the association has been made with the wrong one. The problem is, I did not see that it reloged automatically on my PC. And I purchased a new game. On the wrong account...

The EA assistance is able to transfer one game from an account to another but it will not appear on the gamer account. So it is pointless. I hope this issue will be rapidly solved because I know I am not the only one in this situation.