Originally Posted by demue

If you had a confirmed flight SIN-HKG in Suites and the a/c changed with you ending up in J and waitlisted on other flight in F/Suites then I would reach out to SQ again and demand a satisfactory resolution. It's their changes that put you into this situation and they should fix it. One way is for SQ to get Revenue Mgmt to open up a redemption seat for you on an alternative flight in First / Suites (personally I would not insist on suites, but accept any F seat even on 77W, but your call).

You have been more than patient already waiting for 4 months for SQ to have this sorted and treating this like you initiated the change is unacceptable in my book. Get pushy or fly in J and ask for miles back / downgrade compensation.