I've been quadruple-scheduled for meetings since 8am. Dammit to hell, people!
Been there. Even had situations where I hopped back and forth between three calls. It sucks.
Teams Chat Message to me: "Will you be joining the meeting? It started 5 minutes ago."
Me: "No."
Them: "Can I ask why?"
Me: "I answered that when I declined your meeting."
Them: "You declined the meeting?"
Me: "I suppose I shouldn't be surprised that if you didn't see that I was triple booked when you scheduled your meeting you also wouldn't notice the email notification when I declined."