Hello

Last night my main account was hacked and I cannot enter using my password
it just shows me "Esta cuenta Microsoft no existe. Escribe otra dirección de correo electrónico u obtén una nueva cuenta."
Which means that the account does not exist, but if I try to register with the same name its says it is already taken.
Which is baffling and I don't know what to do.

I would appreciate any help, thanks in advance.