'Housewives' Star Porsha Stewart Accused of Robbing Fans And Pocketing Thousands

11/25/2013 12:15 AM PST

'Housewives' Star Porsha Stewart -- Accused of Robbing Fans And Pocketing Thousands

EXCLUSIVE

"Real Housewives of Atlanta" star Porsha Stewart screwed over her fans and essentially stole several thousand dollars, by showing up hours late for a scheduled event ... so claims the event organizer who was left in tears.

Tanika Olivier tells TMZ ... she hired Stewart to make a 4-hour appearance in Ocoee, Fl. Thursday night.  She wasn't just an hour late... or 2 hours ... or 3 hours.  She showed up 20 minutes before they folded up tent.

According to Olivier ... Stewart had a bunch of lame excuses -- her flight was delayed ... the driver took her to the wrong hotel ... and they had to make a stop to change into fresh clothes.

Stewart was paid $2K up front -- so claims Olivier -- and she had the nerve to demand  the $2K balance.   Things got ugly and cops were called.

Police told the girls to settle it on their own and Olivier reluctantly cut Porsha a $2K check...  but she tells us she's decided to stop payment ... and she wants the initial 2K back STAT.