I ran into a frustrating issue this week with one of my SQ bookings. I had myself and my wife booked for JFK-FRA-SIN in Suites Saver in September. I called after booking to add SIN-DPS in business (as you cannot book mixed itineraries online). The SIN-DPS leg was only available on waitlist, so I made sure they added me. A few days later they called back to confirm as the seats were now made available. I gave my credit card info to cover the additional taxes/fees for that leg, and figured I was now good to go. I checked back a few weeks later, and the trip no longer showed up on my account. I called in, and apparently the waitlisted leg didn't reserve properly, so my entire JFK-FRA-SIN leg was cancelled. And now apparently those seats on the original date are gone. They offered to place us on the flight the following day, but this now shortens our trip by 1 day, and I'll need to move positioning flights/hotels/etc. on top of having a shorter trip. I do have an escalation request out, and should hear back within 24-48 hours. I've done nothing wrong, and now my entire trip is screwed up due to SQ's mistake. What should I do here? Note that we do have a return flight booked as well, with the same issue: DPS-SIN-FRA-JFK in F, with waitlisted DPS-SIN (this return trip is in Advantage, not Saver)

A couple of things came to my head:

1. If they are able to honor the original dates, accept
2. If they are not able to honor the original dates,
   1. Ask for a different set of dates of the original trip duration (force them to open Saver space where only Advantage is available)
   2. Ask for a different set of dates of the original trip duration (force them to open Saver space where only Advantage is available, AND ask for some form of recompense.. miles back, etc.)
   3. Accept the shortened trip, but ask for some form of recompense
   4. Accept the shortened trip as-is
   5. Lengthen my trip by a few days (probably not possible with work/family obligations)

I know I'm getting F with miles (a whopping 738k all-in!), so I'm not some hot-shot high-rev customer, but this doesn't sit right with me. Opinions and experiences appreciated. Thanks.