I am sorry you had a bad experience. I've had my share of those also. However my experience with QCA was very nice. I explained to the young woman who called that I was downsizing and just couldn't add amy more stuff to my collection now. She said I understand, good luck with your task.
But like you, when telemarketers start in on the second request I interrupt them with no thank you and hang up..Usually the callers are reading from a script with someone looking over their shoulder and if they stray from the repeats they will loose their jobs. If we hang up they are off the hook and don't get docked for not following the script. The callers are not the enemies .. it is the company policies.