Tata Capital — charges not waived off and cibil score being hampered

My issue is going on since last last year. Tata capital responded to my email stating that one of their representative will contact us in 1 working day but no one has called yet. My complaint was closed from their end stating that the issue is resolved. When there has been no communication between their team and me for this complaint then how was my issue resolved. The late payment and bouncing charges are still showing on my account (This is because of thei fault as they were unable to update my new nach on their system and their collection manager has also agreed to the fault and have given us in writing) but it seems that their call centres and email communication team is unaware of the full saga and they close the issue stating that it has been resolved. The loan installment got completed last month and i want the charges to be waived off but till date my issue is unresolved.