sign in not possible

after migrating my mojang account it no longer is linked to minecraft but when i sign in with my microsoft account is only comes up with play demo, on another ticket the resolution was to sign in with my mojang account aswell but i cant because when i request i password reset it says if there is a minecraft account linked to this email we will send instruction on how to reset it but because of the migration the mojang account no longer is linked to a minecraft account