Venue Date Given Away

Hello lovelies, congrats to all who are engaged, wedding planning, currently celebrating their wedding or have finished! Need some feedback on a recent situation that just happened to me.
So my fiance and I had found this wonderful and dreamy venue, and out chosen date was for Oct 25, 2025 next year. I coordinated a tour which was set for Sat Oct 19, 2024 to check out the place. We already had our hearts l set on it and was going to put down our deposit during the tour. Mind you, all this had been discussed and agreed with by the manager/coordinator for a month basically since the beginning of September already. They knew we were coming, and knew we were bringing our deposit. Going there to see it was for formality sake (also Oct 19th was a date that work best for both myself and my fiance). Manager even told me that Oct 25, 2025 was available. Fast forward to the present (Oct 5, 2024) I get an email just before 11:00pm from the manager stating that Oct 25, 2025 had been booked today... at this point I'm taken back. But please know that although I'm here venting, and some of you may say that "Well the other couple put down a deposit first," it was just how the situation was handled. The manager did not even tell us or even gave us the slightest chance to have nabbed the date. I feel like it was handled unprofessionally and that in some way it could have been conducted differently. Again, I really do understand that the other couple may have gotten it because they put a deposit down earlier, but the manager and I had a agreement as she stated our chosen date was available. I'm just really upset (and that's an understatement). Help, what do I do. I emailed the manager twice only because my emotions were so mixed and I didn't know what to think or say for those few minutes after the managers email. Part of me wants to send an angry email, part of me wants to reason with her. Help. Is it even worth going to see the place anymore know our date was given away? 😭