1. Forget the account and move on. You could create a new one, but nobody can tell how long it would take before that gets suspended as well.
2. If the suspension has a tangible negative impact on your profession, hire a lawyer and get proper legal advice.
Most important of all, let this be a lesson for you and your colleagues. It is a terrible idea to let any critical part of your life depend on unregulated industries that can wipe out someone's livelihood at the whim of machine learning systems. Learn this lesson and pass it on to everyone you know.
As an individual, you are nobody to Google and you have no leverage. It is reckless to build your livelihood or profession around their platforms. If you were a company, your team could speak to an account manager and negotiate. As an individual, your only real leverage is legal action.
Stories like this appear every month. I don't know how many more it will take before it becomes best practice not to depend on these utterly abominable rackets for anything critical.