You may not have updated your page and that's why you thought you had 4 games left when you didn't. You can always check the number of games played in the history; for that you must go to the "My account" section at the top right of the home page, then to "history". 😉
slt why I am told that I have 4 free games left when when I want to play well it just tells me that I have already played all my free games? not nice it is useless to have 15 if you can only play a few of them... help me please