WARNING--BEWARE!! These callers are B I G credit card criminals, known as the card service scammers. Under NO circumstances give your credit card number to these lowlifes, or it will be regretted forever!
These scumsuckers interrupted an important conference call l was having on my landline. Of course l didn't take their call, but l had to listen to the intrusive call-waiting beeps in the middle of a serious conversation. What kind of bottom-feeders would work for a lowlife "company" like this?! And then they have the nerve to be rude and vulgar to the few people who actually DO answer their calls!
To answer your question, the card service scammers are comprised of ex-cons and druggies, those are the type of bottom-feeders that place the calls to us. It can only be "assumed" that the "higher-ups" are of the same character.