The email address for support isn't answered any more.
However, they may respond a submitted title verification form via email.
Did you use the form they provide on the Support pages?
https://support.chess.com/en/articles/8712557-how-do-i-get-my-title-added-to-my-chess-com-profile
Hi, I sent my titled application to chess.com but have gotten no response for 2 weeks. When I sent an email it redirected me to the chess.com support bot but that is not helping me either.