Hilton hotels have to adhere to a standard walk policy. You got walked: you had a reservation for that night, showed up, and they sent you somewhere else. You're owed this:
Member Relocation and Recovery
1. The guest must be relocated at other Hilton branded hotel if possible. The hotel must pay the full cost of the first night’s stay including any expenses incurred such as transportation and phone calls to family members and business associates.
2. Hotel must complete an online form and send it to Hilton to ensure that the guest receives the stay/night credit and all the points associated with the stay had the guest not been walked.
3. Hotel general manager must follow in writing and and apologize for the incident and and offer an upgrade and/or VIP treatment if the guest returns to the hotel for the rest of his/her stay.
Relocated guests must be offered BEST AVAILABLE accommodations if they return to the property to complete the stay.
Hotel must inform the Guest Assistance about the relocated guests.
This is regardless of your status. If you were Diamond you'd also get $200 cash on the spot.
Neil