A long time ago, my brother started dating someone who had a child. My parents loved that kid so much that they bought him a Switch. I put my account on his Switch because I wanted him to play some games. Let's move forward a year after and my brother and her now ex-gf broke up. I forgot my account was on the kid's Switch so I never bothered with it.
A couple months ago, I started to see some new games appearing on my account. I got scared that my account was hacked so I changed the password. I checked the details and it seems that someone bought them with a different credit card because I never got charged on my card.
Last week, my account got banned. I asked Nintendo and they said that my account made purchases with a stolen credit card. I immediately assumed that it was my brother's ex because I would never risk my account like that.
Well, at this point I'm pretty heartbroken because I've been wanting to play Animal Crossing since forever. I lost so many stuff that I think the best thing to do is to sell my Switch and forget about the whole thing. Nintendo gave me a call and told me I had to prove the credit card was mine, which is probably never gonna happen as my brother and her ex ended up on really bad terms and don't talk to each other anymore.