Apartment Maintenance Due, Late Fine, Penal Interest by Apartment Association in Bangalore (Auction)

I have been looking at a Auction Property in Karnataka. The Defaulter has absconded, bank has taken possession of the property under SARFASESI. The Association which has been sitting on a trove of Maintenance due from 2016 has filed a case against Axis Bank demanding more than Rs.5,00,000/- from the bank. The Property Manager says that this includes the Maintenance approx. 3500 per month, Late Fees, Penal Interest of 12%, and Penal Interest on late Fees. After asking the Manager and asking him for a detailed breakdown, I was able to find the below things: 1. The Apartment's Sale Deed with the bank says 1000sq.ft super built up area, but the Association has been charging Maintenance at 1200sq.ft for the last 6 years. 2. Also they have been charging a Late fee of 300 per month for the last 6 years with the late fees also getting penal interest charged on it also. 3. And the Association President has admitted that the Association has disconnected the back-up generator electricity connection to the house from 2016. 4. The Apartment has piped gas, and the Association is also charging for Piped gas fixed charges to the apartment from 2016. 5. The Association has also demolished a part of the house's balcony citing that the house's balcony was extended into the common area by the defaulting owner, and after the owner was vacated from the apartment by the bank, the association did this demolition. Is there any recourse to this? The President of the Association says and as I quote "By-Laws of the Association are followed as is". And He believes they have spent too much on registering the case so they need compensation for conducting the case as well in the form of Penal Interest. I can offer to settle the pure maintenance due alone (calculated at 1000sq.ft, without late fees, without penal interest, without the diesel charges, without the gas fixed charged) in a single settlement. P.S. There are other dues, fines etc. on the Apartment as well like Property taxes, Bescom charges etc. but none of those are at this level. Please let me know if I can do anything here with the Association here.