Oh gosh
When ever I recieve such a call. I carry on about my business but just string them along for as long as i can......
Sometimes I ask them to repeat what they said as i am having a poo and the bath room has rather an echo
Others, I say that very intersting, say again
Some i give another number to call me back on to chat, sometimes its a posh hotel, others a customer support line of some description etc
Some i ask questions on what religion they are, what football team they like, who is their favourite porn star....yep never get an answer to that one
Some i pass to myself in a different voice and ask them to repeat everything...REPEAT REPEAT
Sometimes bit not often they get quite annoyed and hang up. Mostly they hang up before i do