Should I make my hair stylist re-do my color for free, it's not at all what I wanted?

Since you absolutely told her exactly what you wanted I would say yes. She obviously heard what you wanted, but it hasn't faded yet. Tips, don't go in battle mode first. Be nice about it first and ask nicely, they'll be more willing if you're nice first, then, if you need to go into battle mode. I hope this helps. :)