I had a similarly painful experience using my Reward Certificate for a weekend stay at HSYD, with a total of 4 phone calls required to get it all sorted.
Same as
QF WP, I rang the Australian reservations numbers first, as instructed on the certificate - after I clarified that mine wasn't a 'be my guest' certificate and being put on hold for about 5 minutes, the agent told me to ring the hotel directly. I queried the agent whether there had been a change of policy/process, given that the instructions explicitly said to call reservations, and she said 'yes' but with very little conviction.
I rang HSYD next, and after being connected through to reservations by the switchboard, seemed to get an agent who understood what was going on - she checked for standard room reward availability, and confirmed that one was indeed available for 57,000 points but then followed up by saying that the certificate would cover the entire cost of the stay. She confirmed the booking and gave me a reservation confirmation number, so everything seemed find until I checked my email. In addition to the reservation confirmation email, I received two emails with the title 'Your Hilton Honors Points Redemption has been confirmed', which prompted me to check my account balance - lo and behold, it had dropped by 57,000 points
. Upon closer inspection, it was pretty clear to me that the agent had not used the certificate for my reservation, as the reward certificate number in my reservation confirmation (in my experience, even plain vanilla points redemptions have one of these) did not match the one on my Macquarie certificate.
I rang the diamond line this morning, and the first agent promptly transferred me the reservations - the reservations agent kept on insisting that the certificate had indeed been used, and that no points had been deducted. Once it was clear the call was going nowhere, the agent transferred me back to reservations, and after waiting for a few minutes, I hung up and rang the diamond line again. As soon as the agent picked up, I made it clear I didn't want to be transferred to reservations, and after waiting on hold for 10 minutes and eventually being put through to a supervisor, the issue finally got resolved - the supervisor admitted that the HSYD reservations agent had not used the certificate and apologised that the issue didn't get handled correctly to begin with. She cancelled the points reservation, and correctly re-booked using my certificate, and I can see that my Honors accounts balance has been restored to the level it was before I started this painful process.