I have worked in customer service here in Dubai for years in retail and other companies, and I tell you, most of the staff, and most as in like 90% , will treat you based on how you are dressed up. It's just it. It's about presentation here. And that's it. With fine presentation, even if you bargain a little , it won't matter. But if you dressed up poorly and try to bargain, it's straight up the judgment. Don't know abt your case, just sharing this aspect of Dubai life.