I have been banned from transfer market.

Hi there. According to the screenshot you included, you only received a warning and are not banned from the Transfer Market.

Hi, when im playing fc26, i cannot open the transfer market and i cant sell players, it shows this on web app aswell

Hey, i acknowledge that, but take a look at this picture, when im playing in game, it says my transfer market is locked.

In that case, please submit a dispute so that Terms of Service can investigate the ban for any evidence it was given out by mistake. Instructions for that can be found in this article. Thanks!