Just about everyone must have had some kind of spam call, either automated, or the scammer calling to fix your computer, etc.
For a little while now there have been automated responses to these calls, and some of them are quite effective. However, with some you require a phone system, or a technology that allows you to forward calls. That's not always possible.
Of late i've had numerous calls from scammers spoofing their number to make it look legitimate. By the time i've realised it's a scammer, it's too late, it's interrupted me and thrown me from my swing.
I used to get annoyed with it, but then, I found it better to play along and have fun. It keeps my blood pressure lower. hehehe
There are, i'm sure you know, recordings to play back to the scammers which fool them that they are talking to a real person. You'll find numerous examples of these online.
Depending upon my mood, I will waste their time by playing stupid (it comes naturally, hehe): That method seems to be the best way to keep them busy, and while they are on to me they are not calling anyone else.
I made a recording of my own voice which I play down the phone, answering with simple "yes" and "ok" responses, and asking random questions. I ask them to please repeat as I didn't hear what they said, and I also mumble occasional responses. It does seem to have worked, and the longest somebody persisted was about six minutes. I didn't think that was too bad.