My neighbor abandoned her cat, how to make her pay?

It’s being more than 14 days since she left her cat outside. I noticed a cat was crying outside for a few days until I found him. I have depression so lately I don’t go out. I’ve being feeding this cat for a while and during the raining days I was looking for him but he run away. I stayed out for a while to be wet like him even though I couldn’t find him. Today I found him again and hugged him then noticed his injured but when he saw her he went and begged her even though they look like they don’t want him anymore. I feel broke. I have a small dog but today I confirm he can be inside with me.
My neighbor abandoned her cat, how to make her pay?
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