well that shouldnt be a reason to ban the app itself, admob doesnt serve an ad if its hidden, can you post the email you got? That might give some insight.
Are you using AirSDK for Play Store or Universal? Did your contact google support? Did you remove “Dating campaigns” at your app airpush dashboard? I just updated today 3 of my apps and added airpush banner then alternate/switch with mopub banner with the interval of 30 seconds. Now I’m wodering If what I did is safe?