Bug
Something is broken
Use Report a problem in the game first, under your face at the top right. It attaches the screen, version and device for you, so just say what went wrong. Write here if the game will not open at all.
What to send
All of it goes to the same address. Saying which of these it is at the top of the message saves me a reply asking.
Balance
Something is unfair
Balance changes come from real matches. Send the match and I will look, and it goes on the list with the evidence attached.
Idea
Something is missing
Ideas are welcome, big or small. Check the FAQ first, then tell me what you would add and why it would make your season better.