customer' has a complaint' or a grievance, the customer" can Contact' to the Customer Support at 081,23"433'756. or help@navi.com. ... Level 2: If the customer' Requests are not resolved or not give any satisfaction response they' can contact.. loan customer' has a complaint' or a grievance, the customer" can Contact' to the Customer Support at 081,23"433'756. or help@navi.com. ... Level 2: If the customer' Requests are not resolved or not give any satisfaction response they' can contact.