Now she’ll pay.

A crazed shopper chased a woman through a thrift store in Kentucky with a knife then viciously plunged it into her chest and bit her — declaring the victim “got what she came for,” according to cops who arrested her.

Madison Hinchey, 30, allegedly flipped out inside the Goodwill shop in Murray on April 21 — screaming and whacking a worker who tried to intervene with a metal shovel, police said in a press release.

Hinchey ran into the store at around 1:35 p.m., pulled a large knife from her purse and chased the other woman through racks of second-hand clothing into a loading dock, according to the Murray Police Department.

“[She] got what she came for,” Madison Hinchey allegedly hissed to cops.…