Google translates:
Hello, I need your help. An unauthorized charge was made by airbnb on the credit card of my sister-in-law, we tried to speak with airbnb without any help, is there any way to track the charge with the confirmation number that appears on the account statement?
@Karen1601
Only airbnb can track the reservaton code to the right listing and to the booker. They should help your sister-in-law with this, so she should contact them again.
If it is a fraud from an "airbnb-look-a-like" (scam), google the code to see something comes up, as they often use the same reservation code.
BTW If it is a disputed charge, the credit card company can also be informed.
Contact Airbnb - Community Guide [Updated]
Best regards,
Emiel