My manager told me I'm already getting paid more than I deserve
I asked my manager for a raise, and he told me I'm already getting paid way too much. So I updated my job description and showed him how I'm carrying the work of 4 roles while still being paid based on the one role I was originally hired for.
He told me he doesn't care, that my salary is already very high, and that if I don't like it, I can go somewhere else.
What should I do in this situation? Finding another job at the same salary level probably won't be easy. But I'm doing the work of 4 jobs for one salary, and honestly, it feels completely unfair.