Sky Fibre Upgrade: Cabinet enabled but computers says "No"?

Hello,
I have a strange problem when trying to upgrade from ADSL to Fibre with Sky.
All the checks I have done (BT, TalkTalk, EE, PlusNet) say that I can get Fibre in my address (at 38 or 76Mbps). http://www.dslchecker.bt.com for my address returns:

Cabinet: Exchange SUTTON CHEAM is served by Cabinet 58
High Low High Low
FTTC Range A (Clean) 80 69.4 20 20 -- Available
FTTC Range B (Impacted) 80 60.7 20 12.2 -- Available

So everything looks fine. However, the Sky online system just says "NO". I discussed this with the Sky support people and their tests also show that I should be able to get Fibre.

Anyone has seen a similar case? Could this be a problem with just my line (or somewhere within Sky)?
Samknows says that my postcode is FTTC is enabled, but if I add my phone number it says that is not. How can my building has FTTC but my line not?
Thanks for any advice.

If it is a sky number that explains why checkers fail.

Sometime llu is slower to ipdate its order systems, or may not be taking orders if their backhaul is very busy. How ling since your cab webt live?

IIRC the cabinet was installed in 2013.
Most checkers say that fibre is enabled. Only the Sky ordering system and Samknows by phone number say otherwise.

Which if its a sky llu number is to be expected

Understood. So this might be just a Sky problem and my best chance is to move to a competitor.
Too bad Sky did not give me an straight answer.
Thanks for your help.