@John F. thank you for your reply. Unfortunately I cannot find any KWS android application or developer. Indeed I used some car logos in my application which might not be allowed (even if I paid for them). The complete message from the Google Play Team is:
"After a regular review, your app has been administratively suspended pending verification that you are authorized to publish on behalf of the original content or brand owner - using other companies' logos.
Also your app is KWS violations.
We were not able to validate your account's relationship to the original content or brand owner. In order for us to process your appeal, please provide documentation that the application is authorized in your reply to this notification. Please be advised we will not be able to respond or reinstate your application without the above documentation."
Now I am trying to "guess" what is the problem although my application is suspended, to avoid in the future the same mistake.