a message says it's limited for my account contact support.
but
I contacted support by no answers.

This message means that your account is restricted from participating jams. Typically this happens because you are spamming your project into jams with no regard for the rules of the jams:

https://itch.io/docs/creators/quality-guidelines#game-jams/do-not-add-your-game-to-unrelated-jams-for-promotion

As per the rules of this board, no discussion of account limitations on our public community help board.

Thanks