@nrcha idk, it's not in the list of my subscriptions, but I think that I got tricked by the #UI.
To cancel subscription one needs to click four times:
"Cancel -> Cancel anyway -> Continue cancelling -> Complete cancellation"
The fourth step shows a screen where they present alternative subscription modes.
What I think has happened is that after I clicked "cancel anyway" and then "continue cancelling", I just assumed that it's cancelled because I got presented with options to what I thought was to resubscribe.
It still qualifies as a confidence trick, there is no doubt that they measure the amount of failed cancellations and optimise UX to maximise this metric. Hence "scam".
@nrcha at the time when I tooted, I thought that they billed me for January because I cancelled after the billing window.
Another idea was that they kept my card on record and billed me by mistake.