I got an email on the 27th ( didn't see it until the 31st) saying the miles would expire soon (said the buy offer would expire on the 30th, some targeted buy offer) but in my statement clearly says "Expiration: 12/31/2021", tried to buy miles on the 31st and couldn't (via the targeted link which had expried or via my account) points still showing in the account, tried again on the 1st but on the 1st the account had the miles wiped from them with it dated the 1st. Just tried again now and still says that I purchased the maximum for the year despite no purchase in 2021 and 2022.

If it was a couple thousand miles I would just say oh well but 490K to be exact is a lot of miles and I didn't do anything wrong, sure I waited, but I do my FF checks annually on New Year's Eve in the morning, right down the list UA,DL,AA,AC,LM and if I have any Plat credits (dell or airline) left to spend I spend them then as well.