Hilton Doubletree - Hilton Head Island, SC - Dog Friendly?

Hi! We booked the above mentioned hotel months ago swearing it showed as dog friendly. Now, closer to our vacation, they swear they haven’t been dog friendly but we have no proof. Has anyone else had dogs with them that booked a couple months ago? We had to book a lower class hotel nearby to bring our dog but my conviction for the matter persists. Does anyone have any evidence they use to allow dogs and we didn’t get this wrong?