A boxing promoter claims he was victimized by Nelson Mandela's daughter over a botched effort to organize a Floyd Mayweather/Manny Pacquiao fight to celebrate her dad's 93rd birthday.

Duane Moody claims Zindziswa Mandela approached him several months ago to broker the fight -- which she estimated would pull in $100 million.  Moody claims in return for organizing the event, he would get 15% of the proceeds.

The fight was ultimately scrapped, but Moody claims he's owed $7.5 million -- yes, we're confused by the math as well.