OFB-11!

For the future, what should be done in such a situation?

You need to calm down, take a breath, and not create a fuss on the forum. First, you should at least inquire about the reason why the opponent disappeared; perhaps there was a valid reason? Bishop is not the kind of person who would cheat or be difficult to play against, let alone difficult to negotiate with. Considering that you play every day, and Bishop does too, it shouldn't be difficult to play on another day.

If the opponent is problematic, like Diabler. In this case, it makes sense to write to the judge and ask for an ODD (Over-the-board Delayed Decision) at a convenient time.