If your DM was dumb enough to give you one (unless you earned it somehow), he should be man enough to give you exactly what you ask for, within the guidelines listed in the PHB. If he gave you INT 4, I'd tell him he needs to reread the description for how to adjucate Wishes, and tell him you'll be at home playing Diablo II until he adjucates it fairly. Maybe he was having a bad day, give him a way out, but do not accept terrible rulings (rulings for which there are actually different possible answers are different, you can ask why, but should be man enough to accept them.)