Could someone help me please

  1. My sister brought a bag for 1000 and thought it was real from someone. She went to the store to see if it was a real bag or not...and it turn out to be fake. She called her credit card company and is in disputed. The store won't get involved or write a note that the bag is fake. What would be her next step?
  2. who did she buy it from?
  3. What kind of knockoff is it? Maybe mypoupette website can authenticate it or otherwise.
  4. she asked and then left{?}
  5. Who did she buy the bag from? If she paid by paypal then she can open a dispute there. Hopefully her credit card company will help.