my microsoft account got hacked

i am currently on a new Microsoft account and my old account got hacked. my computer wants me to sign in to the old account when i try to play Minecraft and it wont let me sign into my new one. i tried to change the password of my old account by emailing my self a single use code and changing my password, but when i enter my new password it just says something went wrong. i already purchased Minecraft on my new Microsoft account so i want to keep it but at this point i don't care if i can't recover my old account.

The one on the top that is blurred out is my old account and the one on the bottom that is blurred out not me.