Rude call centre staff

I received a cold call from The Unlimited from a person who called herself \Tiara". I explained very politely that I am not interested. I was then asked to give her someone else's number who might be interested. I said that I didn't know anyone who would likely be interested. Tiara then proceeded to put the phone down in my ear without saying thank you or good bye. That's very rude. <br> <br> The Unlimited"