Stop calling

I got a live person and asked to be put on their Do Not Call list which he agreed to do, said it would take 3 days.  SInce he didn't ask for the number, I asked him if he had my number.  He got snotty and said sarcastically, "No, of course I don't have your number, we just randomly pick numbers to put on the list." I ignored his sarcasm and asked him to tell me what number he showed for me. His response, "Do you REALLY need me to read the number off??"  I said yes, and he actually did read the correct number, then hung up on me.