I’d normally agree — if you ignore an important email, the consequences are on you — but the Google verification process is very hostile and Google do constantly send emails about “important” but actually innocuous things which trains users to consider these emails as unimportant.

The OP certainly has some culpability but having bad experience of this process myself multiple times, it does feel as if Google designed it to be hostile — the emails being just one part of it.

Google Cloud is great in many ways, I love the product, but the billing is such a pain, top to bottom.