If you've been around a while you know that at any business critical scale at all you establish a relationship with your cloud provider and get an account manager. When you do this, you have a number to call.
A billion dollar startup not doing this is a keen lesson for the CTO.
Yes, Google likely screwed up here, but being unprepared for account problems, having no established relationship with your provider is a critical mistake.
The article goes on to talk about Hetzner as an example: their pricing is great for individuals but they literally don't even offer account management relationships - even at scale they actively refuse them. There are equivalent stories of account terminations with Hetzner, which is also a key point: this isn't just a big business problem, at all.