According to SARFAESI Act, Bank is bound to secure maximum sale amount of secured assets. There is some mandatory provisions in the SARFAESI Act regarding the sale of secured assets like valuation of the property from an approved valuer and in consultation with the secured creditor, fixing the reserved price of the assets, notice to the borrower, appearance of the borrower at the public auction, organize public auction after giving due publication in at least 2 leading newspapers and one of them should be in vernacular language.
If a bank fails to comply with these mandatory provisions the aggrieved person can file an appeal, under section 17 SARFAESI Act, before the Debt Recovery Tribunal. The aggrieved person can seek remedy like cancellation of certificate of sale issued under section 6 SARFAESI Act, set aside the public auction or revaluation of secured assets etc.
The section 34 SARFAESI Act, puts a Bar on Civil Courts in entertaining suits in respect of the matter in which the Bank has initiated a proceeding under SARFAESI Act, 2002. Because of many judgments of constitutional courts from time to time under Article 32, 136 and 227 of Constitution of India, it is settled that the Civil Court has no jurisdiction to entertain any proceeding or suit in a matter in which the Bank has initiated proceedings under SARFAESI Act, 2002.
In Mardia Chemicals and others v. Union of India and others (2004) 4 SCC 311, Central Bank of India v. State of Kerala and others (2009) 4 SCC 94, United Bank of India v. Satyavati Tondon and others (2010) 8 SCC 110, Indian Overseas Bank and others v. Ashok Saw Mill (2009) 8 SCC 366. it is held by the Supreme Court that putting a bar on the jurisdiction of the civil court (section 34) to entertain any petition regarding a dispute arising out of the procedure adopted under SARFAESI Act is constitutional and valid.
You cannot file a criminal case against the malpractice of the bank regarding the auction of secured assets. You should file an appeal before the DRT under section 17.