These things are all scams. If you call your CC company and ask for a lower rate, (depending on payment history) 90% of the time they will do it (3-4%). They want you to use the cards, so a lower rate might give an incentive to use them more.
Do not fall for these telescammers.
Got a unsolicated call from this number and they hanged up after our answering machine picked up. We get alot of these calls from other areas. We have been monitoring calls for quite some time. They need to stop harassing not just us, but other people as well.
From Verizon FAQ:
Q18: Can I block incoming calls using Verizon Call Assistant?
A: No, currently you cannot use Verizon Call Assistant to block incoming calls. But, as we are constantly upgrading the Verizon Call Assistant product, please periodically check our webpage at www.verizon.com/callassistant for product updates.