that you've experienced problems. I'm also sorry to see that you've chosen to call BT a "den of incompetents". Quite why you feel it's necessary to be so scathing I'm not sure, and I would have thought it was pretty easy to spot the 'Contact' link at the bottom of this page.
In any event, I have just checked, and verify that the BT Click and buy service is functioning perfectly. Yours is the first complaint we've had in the forum about the service, and I wonder if perhaps you have taken the trouble to phone the BT help number that's clearly displayed when you register for the service?
I suggest that you do that, and come back here (or email me) if you still have any problem. To email me, just click the 'contact moderator' link in the yellow bar at the bottom of your thread.