CardMember Services review: 0% credit card balance transfer

They called posing that they could reduce the interest rate on my card debt. They got one card number from me and the last 4 of my SS and they told me the balances and when I last made a payment. Then they started asking for the other card info which I shared. They promised to issue a new card with all the balances on the credit cards at 0%. They claimed they make their money by adding on a one time fee of $1500. Then when they asked for my full SS I realised it is a scam and told them off. The guy became abusive and aggressive I hung up on him.