After removing Pro status from the site also remove database entry

When I try to remove pro-sites status from one of the websites in the super-admin area I see that the Pro Site status has been withdrawn, but in the sites admin I can still see features which are available only for pro users.

This is because once Pro site status been changed, the level number is added to the database, which is not being removed after the pro site status is expired or withdrawn.

That is why I need to remove database entry or change level id when pro site status is expired or removed.

Any suggestions on how to achieve this, having in mind that there might be future updates for the plug-in. Thanks!