So, I got a multiple account warning because my sister made an account not too long ago, and idk what to do about it. Edit: Guess she was banned. She's opening a ticket, so that solves our problem. Why don't they just make sure before they ban people? js.
You're supposed to file a ticket with both usernames when someone else in the same house as you makes an account. It's in the rules you both agreed to.
I hope you get things worked out though, and maybe you can get your warning removed either now or after a year or two (I forget how long it is before you can appeal to have it removed)