It should have been caught by several people, the dispatcher isn't the only one at fault. I'd be interested to know what the hell the ORS was thinking. But at the same time, why would you just sit there for 1.5 hours?
Even if you don't feel someone gives you the professional courtesy you deserve, you still take the high road and give it to them. That's what makes you better. In this case you give them the courtesy of deciding what to do with your situation, and if they ignore it, 1.5 hours of the easiest pay you'll ever get here is on them. If they tell you that you need to help someone, you covered your arse and helped a coworker. It's a win-win.