You can switch off Sonos App/E-Mail notifications in your online Sonos profile here: 

https://www.sonos.com/en-us/myaccount/user/profile

Is it the system or the app playing the add?

Hi @Pampac, 

I’ll be closing this thread as a duplicate as you have another thread on the same topic. That thread being:

I would recommend following user @Schlumpf’s advice as the steps they’ve provide are what we would suggest as well.

If the steps they’ve provided do help, then please reply in your thread as it will let the users who assisted you and other users who come across your thread know how to solve this issue. If they don’t resolve the issue, then you can keep troubleshooting with the community or Sonos support.

I hope this helps