callers name was Grant Cardone ID# 5D1752771 This man seemed to know every thing about my credit cards and my credit score, payments I make and when the next payments are due etc. He stated that my credit is very good and he would like to decrease my APR's on my credit cards. He had a lot of information as far as part of the # on the cards. He kept me on hold for long periods of time. I became nervous about this call and started thinking that this might be a scam. What would be my next step to take? Should I cancel my cards???