A bad start

Had a bad start today. Quarrelled with one of my HR project mate first thing in the morning.Spolit my mood. We have planned for our project meeting to take place this morning at around 11am as usual. But at 9am one of them msged to inform of the change of timing.It will be postponed to 5pm.

I couldnt make it in the afternoon as I have my tution arranged and so I msged back telling that I couldnt make it and heres the reply I got that made me damn pissed off.

"XXX instructed to put the meeting at 5pm and 5pm is compuslory as the presentation is on Friday.Please arrange your timetable to meet our timing. Attendance is compuslory."

What the hell.You are changing the timing last min and you expect me to rearrange my timetable to fit yours???What kind of logic is this??If you have told me of the changes earlier like last night, I would have gladly rearrange my timetable for you. I know as a matter of fact a last meeting before the presentation is important. But please dun make it sounds that I'm such an irresponsible person when I cant rearrange my timetable and make it for the last meeting. Hello, you msged me at 9am informing of the last min changes and where on earth can I contact my kids at such a timing?? They will be in school and furthermore one of my kid is having PSLE tml so theres no way I can rearrange my timetable. I'm sorry that I cant make it and please for godness sake dun ever make last min changes and expect everyone to be able to make it.Be more FLEXIBLE