It appears that you filed a case against her under section 138 NI Act and she failed to answer summons from the court. In the circumstances a NBW was issued against her.
She can now appear before the court and apply for bail. the offence is bailable and therefore she would be admitted on bail on conditions imposed by court. Further the offence is compoundable and if you want to withdraw the complaint, court can permit you do so. If the accused also appears and agrees to pay to the complainant, the complaint can be dismissed.
In the facts and circumstances no case of defamamtion lies. A case under section 420 IPC can be made out against her.