They called my elderly grandmother claiming they could send her a free knee brace and she unfortunately gave them her Medicare card number. Now we’re terrified because they have all of her personal information. We don’t know what to do to fix this. They sent her a card in the mail and then made contact with her via telephone. My grandmother is 84 years old. They claimed to be located in South Carolina but when I searched the phone number, it’s located in a country that I can not even pronounce.