A publicist is suing LaMelo Ball ... claiming the NBA star owes her MILLIONS after he signed a lucrative contract with Puma but never gave her her cut of the deal.
Amber Johnson spelled out the allegations in a new lawsuit, obtained by TMZ Sports, claiming Ball hired her back in 2019 to score business deals, but he screwed her over a short time later.
Johnson says she worked with Ball to get him on a video game streaming show -- and things went so well, Ball and his reps asked her to work with them going forward.