You do not get the point here

1) Well - in my experience SQ is the only airline not putting you on alternative star partners o far, when THEY messed up the intinerary. LH does that all the time. They would have not problem in putting you on a UA, AC, OS,LX,NH etc. flight when they mess up your itinerary.

2) The second point i that the supervisor told me by phone and wrote by mail that he guaranteees me a seat on the 00.30 to accomodate for the mess and I do not have to decide that now she wrote on 20th of January.

3) Given only Murphys Law, the low likelyhood of the event of default and the fact that she wrote I can guaranteed rebook (well the rebooking of the ticket was free anyway, but the guarantee word in the mail is important here) the Indemnity letter is not a too far option (whereas option is the right word - costing them only in case the event would take place

4) Well 50€ is nothing for them and must actually according to IFRS standards be accounted for in serious businesse and be included in any "dicontinued operations business calculations"

5) The LH ticket already existed. It had a carrying value of 1010€ (the initial amount of 820€ plus 190€ rebooking fee. Had to rebook it, since the night before the flight my mom got a cancer diagnosis)
The recoverable amount in event of cancellation was 210€ in taxes and fees loosing me 800€ (a lot of money for a student)

6) As said in the opening I did not know what to do in HKG for 6 days so I booked this flight

So you see I think I was not too far of track, but if youd like to stick to your "perfect service" picture of SQ then do so and I wish that you never get in a situation like this.