An update for those following my (first world) saga:
I played call centre bingo again this morning and on my first attempt drew an unfavourable location.
HUCA.
Round 2: AU. Bingo.
The CSR confirmed everything that had been confirmed before and used the now familiar phrase "six to eight weeks".
I repeated the two slightly unusual factors in my case: Firstly that one sector of a four sector PNR had posted; but also that I have a four sector PNR starting on Tuesday and a six to eight week delay would mean I'd miss out on stated benefits.
"I'll check with my supervisor".
Short hold.
I was then told they couldn't manually credit the missing 80SC because the system would apply them eventually and if they're applied twice "it becomes a mess". However, the CSR could see I'd met all the requirements and as a "goodwill gesture the supervisor will manually upgrade your status and the DSC will credit in due course."
Status updated ~20 mins later.
I'm delighted to say I've now cracked WP for the first time. Thanks to the AFF brains trust. I'd likely still be PS without you all!
Naturally I'll be keeping an eye that the DSC still appear.
I wonder if I can get into DYKWIA lessons before my Tuesday trip...