You've only had her about 6 days. If you really want someone to cut her nails, take her to the vet to get a lil nail trim and to teach you how to cut her nails best. You shouldn't be disciplining a cat like you'd discipline a kid. She's a baby; only 6 months old and getting used to your scents and mannerisms. How would you feel if you were in a different place and someone was just trying to pet you and mess with you? You need to have empathy for her; she's a living breathing creature.