got yelled at a lot too, be nice to people who call they likely don't want to call you any more than you want to receive the call
Yeah but you're the one getting paid for it and they're not! Sorry, but you shouldn't have worked there. Don't blame the people you're intentionally irritating for getting mad at you for your own poor choice.
Disclaimer that I never yell at these people but I will often hang up on them after the first "sorry not interest" gets ignored. If other people want to yell at them to get the message that they don't want to be bothered, more power to them. Fuck telemarketers.