Whitney Houston Death -- Hotel Guests Demand Refund, Hotel Refuses

Multiple guests staying at the Beverly Hilton Hotel the day Whitney Houston died claim their stay was absolutely UNBEARABLE due to commotion surrounding the singer's death -- and the hotel has done nothing to address their dissatisfaction.

TMZ spoke with several guests who stayed on the 4th floor when Whitney died -- the same floor Whitney had been staying on -- and they tell us ... the entire floor was on lockdown over the weekend, making their lives miserable.

We're told guests couldn't walk down a hallway without being hassled for their key cards by hotel security -- to prove they were, in fact, guests of the hotel.

Worse ... we're told law enforcement and EMS were running all over the hotel all weekend, creating an intolerable ruckus -- making it impossible to get a moment's quiet, let alone sleep.

When guests asked the hotel to refund their money, or offer a discount -- we're told the hotel refused ... instructing guests to file an official complaint either online or at the hotel's front desk.

A rep for the Beverly Hilton tells TMZ, "Given the extraordinary nature of the events of last Saturday evening, The Beverly Hilton took every precaution to protect the privacy of the Houston Family as well as the hotel guests who may have been impacted by the incident."