Originally Posted by seanp7

This is rude, condescending, and unnecessary. You should have left it out.

What you said after makes sense, but you could have made it more polite - eg. "I'm sorry, it must be a bad connection - I'm after a very specific routing and I'd like to go XXX-YYY-ZZZ. Can you try that please?"

I don't think the agent's behavior was particularly stellar but these folks are human and when you said the quoted sentence, you'll tend to lose something at that point. Just hang up politely if you don't get an agent who can meet your needs - we do that here all the time and there's no unnecessary anger on either side.