When you rely on pictures to meet a SP or MA and the person you meet is very different, you got the right to be critical. No pictures is better than fake pictures. If she needs deception to meet men, you don't need to worry about "hurt feelings". When someone lies about something as obvious, this normally indicate that she may lie about other aspects of her services, hygiene and safety. If you're victim of a "bait and switch", you can respectfully say "NO", walk away and report it in the "Ottawa Warnings" sub-forum.
It's the reason why this type of message board exist. The fact you lost time meeting her is bad enough, paying her anyway to be polite will only enable this type of fraudulent behavior. Don't feel bad, there's nothing wrong in walking away.