Please try to post in the right spot, we have a separate board for account support. Maybe not reading the rules in our community is a good indicator why you may have been banned from jams? Do not submit to random jams just to promote your game, if we receive multiple reports from jam hosts about you abusing jams then your account will be blocked from participating in jams.
Link to our community rules: https://itch.io/docs/creators/quality-guidelines#game-jams/do-not-add-your-game-to-unrelated-jams-for-promotion
Thanks