Haha, long time no see. I used to be Lilly1726 way back in the day.
I believe one to unsubscribe you may be able to click an "unsubscribe" button in the email itself to unsubscribe to Wikia emails. Or you can go into your preferences and change the "email me when..." section :)
Sorry I can't personally change who the announcement goes to, but I will talk to FANDOM staff about not notifying inactive users! Sorry :)