We have a towel hanger that is fitted to drywall.
It has two circular bases at edge and has a bar that joins these two bases to make a towel hanger. One of these bases is loose, so it slopes down making the cross bar to fall and hence not usable. After some Google searches, I saw that there is a screw below to tighten but this one has option for screw but Builder didn't put any screw. I have similar one in other Bathroom and its and there are no screws for them too.
Is there any easy way to remove the base or make it stand straight and not slope down?
These are Moen brand, but I couldn't find these Online to see if they have any manuals.
Reference pictures below:
=============================== Update =====================
I was able to find a suitable wrench screwdriver and was able to unscrew the Holder. Now i see the cause of the issue. The side that was loose was screwed in cross.
Is there a way to fix that one part of drywall or i have to remove and fix to a different spot?



