memberships
If you purchased on one of the apps, it goes it to the account linked to the app store
You should contact support directly with information in the payment receipt and they can figure out what is happening.
https://chesscom-support.paperform.co/
That would generally mean they could have been an issue with payment or the membership was a trial and not a fully paid one.
Assuming staff hadn't contacted you about the specifics, you should open another ticket.
https://chesscom-support.paperform.co/