Hair and Makeup Question

So I have booked a hair and makeup artist, went to a trial, and put a deposit down. I have only communicated with the owner and was told at the trial that an assistant will do the bridesmaids…ok no problem. At the trial which was a month and a half ago I asked about the timeline. In the contract it said 6:00-11:30 so I let the stylist know we probably would not need her that early and that I would like to start later around 7:00. She said she would email a timeline closer to the date.


She has now given me a timeline and said that she wants to have me done 6:30-8:30 and that she had to leave by 8:30. Nowhere was I told that she would not be there the whole time for me and I feel that expecting me to be ok with being done 4 hours before my ceremony is not reasonable.
Am I wrong in thinking that when I signed the contract with her that she would be there and not have to do me right at the beginning? She said there is an option for the assistant to work with me but I don’t feel that is what I signed the contract for. Payment and all communication was done with her and her personal email.
Thoughts?