They just called me but no message was left who is this?

I got the same call and tried to call them back, but always get a busy signal, they finally called me again, and said they needed more information to help me with some credit cards.  I actually had been working with a financal company to get some credit card interest rates lowered, and so I gave them way too much info.  Now I am really scared, so I just cancelled the credit card they were asking about.  Hopefully, that will stop them.  Geez, I know better too.  OMG

Just called me as well.

They have called twice leaves no message. Does anyone know who this is?

This is a credit card scam. I they asked me for my credit card number and when I asked them what company they were calling from, they said "the card services division". And I asked from which company? And then the lady hung up! NEVER give your credit card number to anyone.