Hopefully the Karma will rebound on the person that took it.
Now.......Call Kindle Cs.........and report it immediately.
They will disable your account so that no one else can access it.
Ask them the other questions yourself, they can tell you the answers.
E-mail:
kindle-cs-support@amazon.com
Phone: within the U.S.: 1-866-321-8851 (toll free)
outside the U.S.: 1-206-266-0927 (charges will apply
If this is not the proper number, ask them to transfer you.
Good luck.