Me and 5 others were asked to change flights as they had scheduled our Airbus to be serviced and had to reduce passenger numbers by 200 . I offered to delay our return until next day and Thai Airways agreed to pay for an extra nights stay at our hotel in Koh Samui plus some compensation ( the alternative was for Thai Airways to pay for a hotel at Bangkok airport) I have submitted my invoice for the hotel on behalf of everyone in May last year. Despite several emails and replies saying they are looking into it, I still have received nothing. I have always rated Thai Airways as excellent but their customer services leads a lot to be desired !