Cold-calling at its very very worst

Honestly, it's hard enough trying not to turn into a Grumpy Old Woman when you turn 36, without the world and his mother giving you perfectly valid reasons for doing so! Today I received possibly my millionth cold-call since going into business, from a man trying to sell me advertising. I was ready for him (or so I thought) when he said "hello, this is the police calling". My silence made him think that he'd got me worried - and he was clearly hoping to worry me, so that he could then sell me advertising whilst I was in the throes of relief when he said "don't worry, you're not in any trouble". I knew exactly what was coming, because this particular organisation had already tried to sell me advertising in a police awareness magazine a few months ago (with a very similar opening line), so as he launched into his spiel (after asking if I was the business owner) I politely said I wasn't interested. At this point he said "you sound far too young to be a business owner, put your mum on please". I nearly fell out of my wheelchair. I said "I am 36 years of age and the owner of this business". He said "no you're not love, now put your mum on". I'm seeing red in a big way. I said "how dare you cold-call my business number and proceed to insult me". He said "stop messing me around and put your mum on the 'phone". I am starting to wonder if I've slipped into the twiglet zone - surely salesmen, however annoying they are, don't really talk to people like this? But no, he was real enough. Failing to see why I should try to carry on convincing him once it became clear that my dog is more intelligent and much more polite, I put the 'phone down.

Now I don't mind people thinking I'm younger than I am (who in their right mind would?!) - I am quite small because of my disability and this means my voice sounds young on the 'phone. But when a man I never even asked to call me in the first place accuses me of being a liar again and again, well, that just takes the rusk.