Your rating is completely up to you, however in this instance IMO the Negative review was a bit too harsh, given that you did not respond to her text asking to wait for 2 mins. You could have replied saying you can't wait longer than certain mins. Also, 10 mins is not that long considering she might be getting herself cleaned up from a booking that went over ran. I understand your actions were also based on other WGs in the past being late. Also, the WG should have had better time management.
Like I said, your rating is totally up to you.