Update:
Trying QR INTL, UK, US, SE webpages, reservation is accessed, alas no link for seat selection
Trying AY, I first try their UK webpage, where I access my booking, but no link for seat selection. On the SE webpage there is a the link for selecting seats, it also states that the price for seat selection is €0 - I'm OWE . However, I'm met by message :
'We are sorry, but we can not sell any seats for this flight presently. You will be assigned a seat at check-in'
What's the problem with RJ MMB?