Find google data protection officer email. State your request to get the data with a mention of escalation to the Irish Data Protection Officer if no action is taken within a reasonable timeframe.
This has magically unbanned me in less than two days. In contrast to two months of tweeting, emailing support, nagging my google eng friends and even support folks via linkedin.
The author should consider himself lucky. Just one google service has been suspended. I got my account banned for no reason and lost access to more than 10 years worth of emails, documents, single sign ons to different apps, etc.
Only invoking GDPR and the ownership of a domain name allowed me to regain access and restore email service. Without GDPR I would've got nothing at all.
Things are uncertain(were they ever certain?), every day there is another armageddon prophecy screaming at you from social media and newspapers.
So one can try to hedge, squeeze more out of oneself to make sure he did all he could.