Barnard Castle, England hotel rooms at the Premier Inn

"Found a room on the Hotels.com app but stopped by the hotel to check it out before booking. The front desk initially said no rooms were available, despite the app showing otherwise. After some persistence and a 10–15 minute discussion involving another staff member, I was shown a room I liked. Due to system issues, I was told to book through the app. I did so, paid, and received confirmation, which the clerk also saw—but they still couldn’t assign the room due to aforementioned system issue. I...