It gets better, I too had my account closed for inactivity, but I STILL get emails from them I can't stop because I can't log in to change email preferences.
That's illegal. No private right of action though. Gotta go through your ISP or FTC, assuming you're in the USA.
Almost sounds like one of the intentional product decisions
Mark as spam.
I got banned from Google Admob (or whatever it is called now) and they still send me promotional emails.