I also got a call from dear old Heather. My mother, age 93, gets these calls all the time, even though her number, like mine, is on donotcall.gov. Guess what? When I go to file a complaint, donotcall.gov's complaint web page "cannot be found" by Safari!
WARNING--BEWARE!! These callers are B I G credit card criminals, known as the card service scammers! Under NO circumstances, give these lowlifes your credit card number, or you will regret it forever!