Two weeks before your subscription expires - they auto-renew if you didn't disable that function. I didn't disable the goddamned function and - of course - they auto-renewed me for the Cadillac plan that's $160 a year. My perfectly fine cheapie plan was $60.
I'm in the process of trying to get a refund and I'm not enjoying it.
Sign up for Mullvad honestly. I have a bunch of sitashi laying around from maybe a decade ago and paid for I think 3 years up front.