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.
I recommend using Mullvad instead. 5 euros a month, you can pay using crypto or even cash in an envelope.
They have 12 months cards you can buy on Amazon, too. Not as anonymous as cash, but more than using your credit card directly with them.