Early move-in Question

My daughter (2nd year) just went to schedule move-in for the earliest date (8/18) and it’s booked. The earliest option shown is 8/20 which is my first day of school as an elementary school teacher and I absolutely can’t miss it. I want to help her and she wants me to help move her in as well. What are our options? Has anyone had experience or heard of someone being able to get early move-in by calling or something even though it is booked? She did not know that she needed to do this mid July. Hoping one of you can help offer suggestions. Just tried calling and since it’s 5pm, they are closed. We are out of state, for what it’s worth.

Thank you!