But i Write with steam and they told me that my Account on steam is deleted, i cant authenticate my steam Account
As I said only you can remove a account. Bungie will not remove the account for you for ANY reason as it compromises their security measures. Bungie has to be 110% sure before letting you mess with a account settings and will not step in as for all they know you are using a hacked or sold account. Bungie has no access to your account details which is why the authentication system is used.