Dec 2016, I took MAS to Bangkok with 2 different b...

Dec 2016, I took MAS to Bangkok with 2 different booking (2 person = 1st booking, 7 person = 2nd booking), before departure, 2nd booking rcvd inform that return flight be delay, but 1st booking did not rcv any inform (even thought on line checking also remain same no change) ; till the day of return, 1st booking 2 person arrived Bangkok airport just be informed the flight be delayed to 2nd day, & the MAS office at that airport also be closed (there is around 7pm), totally cannot get any feedback.
after came back, I submitted doc to claim insurance, till now, be informed that claim cannot be processed, b'cos MAS not admitted their delay, & not issue letter for insurance process.
what's fxxx MAS, delayed flight w/o inform, waste my time in Bangkok, now still not issue letter for me to claim insurance, really TMD.