Similarly, one day while at my desk writing a report, I got a call from "Matt from Windows" who said that my computer had automatically sent him a notice that there was a virus on my computer and he needed to access my computer to remove it.
I thanked him for his effort and said that I was out by my mailbox and asked if he could give me a couple minutes to get back in the house. He obliged, and I set the phone down and went back to my report.
After a few minutes I heard him calling "Hello? Hello?". I picked up the phone and explained that the dog got loose and to give me a couple minutes to catch him and bring him in house. He obliged, and I set the phone down and went back to my report.
After a few more minutes I heard him calling "Hello? Hello?". I picked up the phone and apologized saying that I got the dog and was going to the computer but had to turn it on and get it booted up before we could start so he would need to give me a few minutes. He obliged and I set the phone down and went back to my report.
After a few minutes I heard him calling "Hello? Hello?". I picked up the phone and said that the computer automatically started running an update and he would have to wait a few more minutes. He obliged and I set the phone down and went back to my report.
After a few minutes I heard him calling "Hello? Hello?". I picked up the phone and that his choice to being a scammer showed he was a person of low moral values, but the fact that he couldn't figure out that I was messing with him this whole time showed that he was a stupid person of low moral values.
Then I hung up, happy that I was able to tie him up for enough time that lessened the number of similar calls that he could make that day