National Highways Authority Of India [NHAI] — FASTag Vehicle number ka04mr9390

My vehicle number is KA04MR9390. I am using Airtel bank FASTag. Inspite of having balance of INR 4000 in my Airtel wallet, NHAI says there is no balance in my FASTag. I have raised complaint with NHAI and the complaint number is 4884272. When I ask for a tentative resolution date, I have been told that NHAI will call me when the issue is resolved. I have ended up paying more than 1000 rupees as penalty is different tolls in Karnataka.