If it was something I'd had a contract for I'd push until I got it. If it was a promise from a friend who didn't deliver I'd shrug it off. In either case, I'd suck it up.
Worrying about broken promises is usually kid-stuff.
If you were promised $1 raise and you didn't get it what would you do?
I cried all the way back to America. 10,000 miles.
Their is nothing to promise me at my age