I pushed “1” to speak to an “agent” on one of these calls. When I heard his indecipherable accent, I said “You don’t even speak English.” Before disconnecting, he said, in fairly good English “go f**k yourself.”
Another insult is to call them Pakis
“I have trouble understanding you Pakis when you talk so fast”
Sounds like one I spoke to one time. I politely asked him what country he was from - India or Pakistan. He seemed offended by my question, when I was taking time out of my day to try to validate him as a person by engaging in small talk.