Is it possible to report this somewhere?

My grandma is, unfortunately, quite gullible in her old age. She already fell for the Publisher's Clearing House scam--was on her way to get the green dot card or whatever and wouldn't listen to us when we finally had a local police officer call her to inform her it was a common scam.

Now I found out she has bought a couple things from websites--from links she receives via e-mail. I told her those are just spam ads and she needed to delete them without even opening them. One of the things she paid for she never got, but the other one was for some kind of skin cream that I believe she did receive--the website site apparently claimed the first order was free and she says she only had to pay shipping and handling, after that it showed a balance of $0.00 owed. She even read me the fine print. Now she has gotten a call from a foreign person saying she owes $139.00 for the skin cream and since she has refused to pay she will be turned over to their collections department.

Is there anything I can do to help her in this situation? I've already told her to change all her passwords and contact her credit card company about possibly bogus charges. Should she just ignore this guy's threats? Is there an agency or something this can be reported to?