You haven't read the thread! The OP is arriving from BKK, on a separate ticket, in HKG at 10:30 on the night before the original (now cancelled) flight...which now only gives them an hour to make the new AF departure, instead of the overnight stay at the airport that had originally been envisaged.

My advice to the OP would be - as you are having a hard time getting the AF flight changed, what about changing your flight from BKK to HKG? If it's not changeable/cancellable/re-bookable (and you were prepared to drop this flight if AF had instead flown you direct from BKK), why not try finding a different one-way flight from BKK-HKG that will get you there in time for your AF flight? One ways should be cheap(-ish) on this route. I know it involves spending more money, but it might be the quickest/easiest solution for you.

The airlines that fly BKK-HKG are: Thai, Orient Thai, Cathay Pacific, Air Asia, Hong Kong Airlines, Sri Lankan, Royal Jordanian, Kenya Airways, Pakistan International, Emirates and Ethiopian. They don't all fly every day. You could possibly pick up a very cheap flight on one of those "tags" that operates onwards (i.e. Sri Lankan/Ethiopian/RJJ/Kenya/Emirates ) or on one of the low cost carriers.

Though, of course, make sure you allow PLENTY of time to make your connection at Hong Kong - you may not be able to interline your bags (esp if on a low cost carrier) so allowing time for luggage retrieval, potential delays, etc, you should really consider arriving early on the day of your AF departure.