rude and bad service

were in a quee fir 20 minutes and a customer infront of me inquired why are we not being serve. As the cashier trying to explain, a guy at the back respondedin a rude manner. We request for the manager , Raymond responded again in vernecular, intructing jabu the manager and he "attender lento" meaning attend to this thing. The manager said nothing to raymond. Raymond still went on insulting the insulting the indian customer in vernecular