Bad Attidude

I receive an sms to collect my wifi router, so i got a ticket to wait for my number to be called, then this this two gentlemen also walked, they needed help as well from the technician, so instead of the technician to call the number he started assisting the guy who found me there, even one of the stuff member ask why is he not calling the number or assist the person who came in first, he started being rude, he said he chooses who he wants to help, unfortunately we can not deal with such behavior. he doesn't know how to deal with black and he cant do favors. His name is Jan, he lack customer service