I'm registered with the telephone preference service. But that doesn't seem to stop cold callers these days. Yesterday I had phone calls trying to sell me an anti-virus for Windows (I don't use Windows,) cavity wall insulation (I don't have cavity walls,) wooden windows, and advice on claiming a refund on payment protection programs.
The phone calls from India trying to tell me about the trojan virus that is attacking my computer via Windows are really bugging me. They ask for and address me as Mrs XXX (XXX being my husband's surname. My name is different.) And won't believe that I don't have a computer with Windows on it. They won't give up if I leave them on hold, threaten them with the TPS, give the phone to 4yo DD or ask for details about them so I can call them back if I am interested (Yeah, right!) I am getting about 7 or 8 calls a day from them and they won't give up. When I mention the TPS they put the phone down, but then call back 10 minutes later.
Today DD was playing with a whistle she got in a party bag, and I thought 'a quick blast of that down the phone should put them off calling again.'
Other than that, has anyone got any other good ways of dissuading really persistent and annoying cold callers?