Very confused

Just now I spoke to your Customer Care Centre accounts department. I tried to change the 24-month Top-up contract for my router to an open account, so that I could take advantage of the Night-owl data. I was told that I would have to change to a 12-month account and pay increased charges.<br> I had understood from your brochure (see, for example, the brochure for February, pages 32-33) that if one has an open 24-month contract you would automatically qualify for the Night-owl data. There is nothing on those pages which would not lead a customer to conclude that this is indeed the case, and no mention at all of 12-month contracts.<br> So it would seem that either your Customer Care Centre is mistaken or that your brochure is misleading.<br> Would you kindly clarify this matter for me? Many thanks.<br>