I think 'ending up with an accidental BahnCard and losing a painful amount of money because of it' might be almost a rite of passage at this point.
Happened to me as well; I had a 'youth' card for people below the age of 27, even remembered that some cards auto-renew and checked online to see if mine would, because I wanted to make sure I wouldn't just get upgraded to the regular and much more expensive BahnCard... couldn't find a renewal date and thought I'd be fine. But apparently I didn't check thoroughly enough, and only got informed of now having 200€ less and a shiny new BahnCard by email. Also emailed support, also didn't get anywhere.
Later I mention this to a friend... and he says 'ah, yeah, same with me'.
Happened to me as well; I had a 'youth' card for people below the age of 27, even remembered that some cards auto-renew and checked online to see if mine would, because I wanted to make sure I wouldn't just get upgraded to the regular and much more expensive BahnCard... couldn't find a renewal date and thought I'd be fine. But apparently I didn't check thoroughly enough, and only got informed of now having 200€ less and a shiny new BahnCard by email. Also emailed support, also didn't get anywhere.
Later I mention this to a friend... and he says 'ah, yeah, same with me'.