If you had a negative time, you should stick by your review.
If you feel there was some mitigating circumstances (you were tired after a long day or something) then mention those.
The only thing I would say is I disagree with is the ‘scammer’ part, I tend to feel if you get a service, even if it’s not good, they haven’t scammed you, if you pay a deposit and they don’t show or once they get the money disappear (“I just need to give the money to the driver”), then I would call that a scam (or fraud to use its proper name).
Better luck next time.