ordered to complete illegal and fatigue inducing rosters.
FUB, are you really saying you have completed an illegal roster?
More fool you if you have; it is you that is putting your licence in jeopardy.
If you believe you have been rostered an illegal flight, tell crew control and if they say it is legal ask for it in writing. If they refuse, ask for the supervisor and repeat your request. If he refuses ask for the duty flight ops manager.
If he refuses and/or you are still in doubt tell the AOA - before the flight, not afterwards.
If fatigue inducing, I take it you know what an ASR-F is?