the quality i would say looks to be average. it looks like costume jewelry, and most jewelers don't sell costume, so i just don't know what to say. maybe take it to a local jeweler and ask them for their opinion if it can be fixed, i'd say not. if i were you, i'd just wear it as is, the holes where the peeling is won't show, and it was a nice gift from your aunt.
the only issue is if she was sold what she thought was white gold, and it's not. there is a big price difference between silver and gold. that would be my only worry.
the only issue is if she was sold what she thought was white gold, and it's not. there is a big price difference between silver and gold. that would be my only worry.