Earlier quoted context omitted.
I'm not saying this is acceptable in any way... But there IS something you can try to get resolved fairly quickly if it ever happens again. Be sure to claim domain ownership in the Google search console. If there is a flag of some sort, it will show up there. And you can address it there. I worked for a financial services company where this happened. The public-facing .com domain was set up first, before I got there.…
what number do you call to speak to a human at Google to help when this doesn't work "fairly quickly"? obviously the biggest issue described in the above post is the lack of humans in the loop
If you can afford it, the fastest and easiest technique I've found is just showing up at HQ. The front desk is kind and helpful and knows the right person to route you to.