In case there are some unsettled issues regarding admission, examination, or certification, one can make a complaint using the NIOS number. NIOS also has a dedicated helpline to handle student complaints in an effective manner. The NIOS contact number helps in reporting the grievance to the concerned department for its early redressal. Students can also submit written complaints via the official grievance redressal portal if they are not satisfied with the reply. Follow-up and persistence ensures that students' problems are solved efficiently.