Hi there,
Hard to see from the picture if it is 'on' the surface of the paint or actually wrong applied paint.
But few months ago I learned a very handy trick, so will happily share
Take a q-tip and dip it in type of vegetable oil, e.g. like sunflower oil or olive oil. This is easy and safe solution for wiping off glue-like residue (vapours/fingerprints and sticker-glue / annoying things like that).
If this does not help, I would ask for replacement bcs it is an ugly stain indeed.