Woulda done been out! Not worth the time if they don't even acknowledge it or apologize after multiple occurrences

After the second time I would typically keep my distance

Three strikes you're out

Depends on who they are (blood family pretty much get unlimited) and how important the level of failure is (ie financial/legal advice fu once and you're history just being bad at time keeping isn't so bad).

Even saying sorry if they keep doing it is not really sorry is it?

I'd say 3-5 max given what you described

I don't see enough details to answer your question but I guess you can answer it.

2 times max, then I'm done

I have much less patience with that sort of thing than I once did.