National Highways Authority Of India [NHAI] — Denial towards waiving of toll tax exemption to defence personnel

I, Maj Kiran Reddy A serving Major in Indian Army while on duty travelling from Bangalore was denied for exemption of toll tax in my vehicle KL13AS9075 at Mulbagal toll gate and was charged Rs 75 which got debited automatically from my fastag . I have spoke to the manager also but he denied to refund and saying that it should be reverted from NHAI then they will refund me. I request you to refund the toll tax paid by me.
Regards
Maj Kiran Reddy
Jai Hind