Re: Registered company business name is used by someone else.
Google AdWords doesn't allow the copying or distribution of copyrighted material unless you have consent from the copyright holder, or are otherwise permitted by law.
To send us proof that you have the necessary rights to the copyrighted material (Say your business name), you can fill out copyright documentation form.
For more details in Trademark, Copyright, and Counterfeit policy visit https://support.google.com/adwordspolicy/topic/2912980
I hope it may help you.