Irritable Customer Experience
Quite annoyed with the way your website is set up to railroad you into accepting delayed flights before it will let you back into your booking to manage it. Further annoyed that it was made more difficult to find an appropriate contact detail (due to ambiguous wording for different options) in the event you might want to call regarding it. But finally, I'm most irritated that your call handler had absolutely no care and practically revelled in telling me I'd already accepted the flight and waited several days before calling in later, so there's no way she'd be able to assist at all, and also my ticket didn't allow me to inquire about any (paid) upgrade. I'd expect this level of service and cost-cutting from Ryanair but not Singapore Airlines.