Talking of cold sales folk, I had one last week which annoyed me intensely. I don't know why I didn't do my usual (see a bit later).
This person (who, of course, spoke extremely broken Engrish) told me that someone in my family had had an accident and did I want to claim compensation?!
Well, if someone in my family did have an accident, I think the family would have contacted me first before some total stranger in India!
My usual is to tell them that they've got the wrong number. An interesting one I had a few weeks ago:
Cold caller: "Hello, can I speak to <name that was not me> please?"
Me: "Sorry, you've got the wrong number."
Cold caller: "Can I speak to the householder please?"
Me: "Sorry, you've got the wrong number"
Cold caller: "OK, sorry to trouble you!"
She must have felt like a right idiot after that exchange. Sometimes, I just tell them they've got the wrong number after they've asked for someone who does not live here, and hang up anyway.
Hmmmm, perhaps I should put some Moya Brennan on and hold the phone to the speaker until they hang up?
Cold sales callers have obliterated words such as "No" and "I'm not interested" from their dictionaries. The only way they can be made to understand is to hang up.
Mozzies! Don't you just HATE it when you hear that BzzzZZZZZ
ZZZZZZZZZZ! and you know it's landed somewhere in your ear, and is starting to feed off you
But one thing that annoys me is folk who cut me off mid-sentence to give their attention to someone else who has butted in. That's just downright rude. I usually make a snide remark when that happens, or just go elsewhere.
And also folk who cut you off mid-sentence and jump to a conclusion you're not going to arrive at, and then shoot you down for it

If you don't know what eschatology is then don't worry; it's not the end of the world.
Purveyor of fine sarcasm since 1966.