Several years ago my Mum had a call from what she understood was the health service and since she had just come out of hospital after a knee replacement op that seemed feasible. They chatted to her for ages about how she was, what medication she was on, what aids she had in the house etc. And then told her she could have an all singing all dancing new bed!
By the time I got to hear about it a rep was coming from the other end of the country who just happened to be in Mums area that day.
. Turned out they were selling beds at thousands of pounds and nothing to do with the health service. I couldnt be there that day as I had a hospital appointment but I told her she was NOT to let them into her house and that they were to ring me. I never heard from them. My friends Dad in another part of the country had dementia and he signed a form with the same people agreeing to buy a bed for aomething like £4000!! She had a real battle getting it cancelled.
Maybe your phone call is similar?