If the customer has a complaint or a grievance against Navi loan, the customer can Contact Customer Support at 081-4754-4555. or help@navi.com. … Level 2: If the customer Requests are not resolved or they do not give any satisfaction response they can contact at Grievance’ redressal Officer’s mail: grievance@navi.com or at Nodal Officer’s mail: nodaloffice@navi.com