Shower venue rant

NewMommy
My shower is in 3 weeks and my mom got a call today from the venue that we lost the spot bc they accidentally overbooked!  Supposedly the other people booked before us but were never written down in their reservation book. They refused to budge so we got kicked out!  Invites have gone out so now my mom has to notify everyone of the change. Thank God she found another place that has an opening on the same day as I'll only be in town for the weekend (my family is in NY and I live in CA). She's getting her deposit back tomorrow but now we need to alert everyone and find a bakery who will deliver to the new place. Plus the other place was giving us a credit towards a cake so now that will cost more. So aggravating!