Hi,

I also always received many call asking for card details especially cc no. Very easy to fend them off. Every time I just said ok, and then said 4,5,6,7,8....

Normally by the time I reach no 8 they themselves knew that they are being con by me instead and will hung up. I think this method worked very well for me. Less than 10 seconds they give up. No need for you to ask them all the questions