I'm trying to secure my bathroom vanity and it's fairly wobbly. I realized it's not flush with the wall -- possibly because the wall is not a straight 90ndegrees. I placed some thin strips of wood underneath the vanity to shimmy it up, and it helps a bit, but it's still wobbly. I'm not sure how to make the vanity secure and not wobbly, and how, if I should, secure it to the wall.
Attached is an image of the vanity and my wall.
I'm grateful for any advice for how I can proceed.