Indusind — Car Loan NOC not received

Address:

113/120, opposite Moti Jheel Gate, Motilal Swaroop Nagar, Khalasi Line, Swaroop Nagar, Kanpur, Uttar Pradesh 208002

I got a card loan from Indusind bank, Loan Account Number: ULK05609C under the name Mohd Hasir. I sold the same car (Hyundai Eon), there was a deficit of Rs10, 000 something which I deposited (cash) at the bank branch on 22nd October. The cashier (Chavi Ram Singh) sitting at the bank branch made a mistake and deposited the deficit balance in wrong loan account number: ULK05602C under the name Mohd Ehsan. Now it's been 2 months but the bank is not giving a definite answer. For the last 2 months they are saying it'll be done in 1 week again and again. The person whom I sold the car too wants to get his car transferred on his name but he also has been waiting for 2 months because till the time balance is not cleared out NOC can't be issued.
It's my dearest request to please contact them and get this resolved as it's the bank's fault.

For more details I'm providing Bank Branch and receipt of the cash deposited.

Indusind Bank: 113/120, opposite Moti Jheel Gate, Motilal Swaroop Nagar, Khalasi Line, Swaroop Nagar, Kanpur, Uttar Pradesh 208002