Welcome, how can I help you?
I am trying to make a purchase on the site and it keeps saying my card is rejected
oh no! I will be happy to help you with this.
thanks
here ae the steps I suggest that we try

first thing to do is to re-enter your credit card number. sorry, I know that's a pain
I have tried that and it seems to be right
ok, let's try logging out of your account and then logging in again
odd that seems to have worked, not sure why
it's a mystery! glad it is working is there anything else?
thanks for the help no that was all
ok. have a good day!