First, you need to make your company rely on 200 consumer Gmail accounts for their business. I mean, if you can get them to that level of idiocy, nothing really helps, right?
If the company was using consumer accounts, then this is exactly the behaviour that is expected (very easy to create a bunch of accounts that are all associated with each other). Both the company leadership and IT team/vendor should hang their heads in shame.
If the company was a paying gsuite customer then this type of action towards a corporate customer seems odd but not unusual. The OP committed TOS violations but may have no awareness of what TOS violations other customers were committing (if you allow that sort of culture, you reap the rewards... etc).
I find it hard to believe it is the latter scenario because the admins of the account would have been notified multiple times before any adverse action was taken (there have been many stories of individuals / companies getting banned after ignoring emails to change behavior / actions that violate TOS).
Do you know there is a thing called Gsuite for business? Let me change your sentence to "First you need to make your company rely on 200 nodes on AWS for their busineess". I am not sure who looks really stupid here?
I understood it as if they used GSuite as well. How would 200 independent Google accounts be shut down, if one of them violated the terms. That sounds like an even bigger problem then..
I wonder how long a student who didn't finish his assignment does the same and locks an entire school out, including their Chromebooks. A lot of schools seem to be migrating to google services.