If such annoyance cannot be settled, surely will not subscribe the service anymore.
First, I’m an Avast user and not an Avast Team member.
As you don’t mention specifically what these notifications are or what Avast Application you are using ?
You need to look at both the Notifications and Personal Privacy sections of the Avast User Interface
Managing pop-up notifications in Avast Antivirus Premium
- https://support.avast.com/en-gb/article/antivirus-popup-notifications/#pc
- Scroll down to Stop offers for other products.
- If you use Avast Premium Security, you can additionally stop seeing offers for other Avast products. ** Avast UI > Menu > Settings > General > Personal Privacy.
- Also check the AvastUI > Menu > Settings > General - Notifications, I would suggest using the Pop-up Notifications treatment - Limited Mode.