one more person at work I hate

A customer service rep gave me a credit card to process. It didn't go through. I had the following conversation with the CSR (via email):

me: Her credit card was declined.

him: Oh Boy
Lets go over Credit card Number
Be sure it matches to old one in ticket
If yes then lets give her a call

me: I used the same # I used last time – it’s saved in the program.

him: I guess we call

me: We? You.

him: Didn’t know I was part of accounting
Next time I need a quote I’ll call you
Please bring over order – since you have them

I brought over the info that I shouldn't have had anyway and said "I don't talk to the customers" which is entirely true. (Would you want some stranger calling you asking for your credit card info? Me neither.)

He went "pssht" like I was being childish. That customer is YOUR customer. I have nothing to do with AN customers, while you've been talking to this particular person and helping them with their order.

Grow up! (And please use proper punctuation!)