Miscommunication: I told you the appointment was at 7, and you thought I meant 7am when I actually meant pm.
Misunderstanding: I said the appointment was at 7 and check-in is half an hour early, meaning I had to be there at 6:30, but you thought I meant that the appointment was at 7:30 and I had to be there at 7.
Obfuscation: I said that I have appointments at 4, 7 and 9 today and then a handful more tomorrow, nothing is too important, no worries.
Lack of Communication: I won't tell you when the appointment is, if I've even told you there's an appointment at all.
Lie: I said that the appointment was at 5.
Gaslighting: What do you mean I told you the appointment was at 5? it was always at 7. I definitely never told you 5. You've been getting confused about a lot of things like this lately, are you sure you're okay? Maybe you need more sleep, or you should consider seeing a doctor. I'm worried about you.