Re: Ass Elbow
I blame you for this!
Ok that's a little harsh, but tbh I'm pretty sure it's your own fault you wasted the first two weeks of time.
I would take a very well educated guess that the phone line that was installed originally, which you had the DDI for, was not a BT line. I say that in the sense that it was probably purchased and paid for via a third party telecoms company such as Daisy.
I know from experience that BTs accounts and line fault departments don't hold records for DDIs belonging to these third parties. I recently had to call in a fault for one of our Daisy owned lines, and found that BT had no idea what I was talking about. After working out it was a Daisy owned line, I called Daisy and a BT engineer was out the next day to fix it.
Moral of the story: don't always assume you know better than idiot on the end of the phone, because very often you'll be wasting your own time.