purplerabbits

I want to cancel my Barclaycard since I never use it and I want to streamline my finances. But since I last contacted them the barclaycard phoneline has gone all automated and demands a security number which I do not have before it lets you in. Does anyone know how I can contact a human being and cancell my card for ever? I don't owe any money on it so they never write to me, and I tried emailing them from their web pages but didn't get any kind of reply...

Update: Success! Thank you Giles!