You can file a writ petition before high court seeking to cancel the auction sale of the property.
But for your information the bank may take a stand that the property was sold on as is where is and as is what is basis and that the intending bidders had to make discreet enquiries as regards the property to satisfy themselves about the title, extent, quality and quantity of the property before submitting their bid.
The bank may further declare that no claim of whatsoever nature regarding the property put for sale, charges, encumbrances over the property or on any other matter, etc., would be entertained after submission of the online bid.
As the petitioner participated in the auction sale knowing fully well that this was one of the conditions of the sale, the bank can assert that he could not now raise an objection as to the title of the subject property not being clear or lawful.
The bank can even counter stating that the rule of caveat emptor would apply and the borrower had to beware, i.e., a careful buyer should take care to examine the item before accepting it or obtain expert advice.
But you should not deter your determination to fight back and get the sale consideration advance amount refunded if found that the bank did not have clear and marketable title to auction sell the property.
You can also take shelter under the umbrella of the section 9 of the Sarfaesi act which states that :
under Rule 9(1). Clauses (a) and (f) in this proviso are relevant and read as under:
(a) the description of the immovable property to be sold, including the details of the encumbrances known to the secured creditor;
.f) any other thing which the authorized officer considers it material for a purchaser to know in order to judge the nature and value of the property.
In a judgment The Allahabad High Court observed that a duty is cast upon the authorized officer of the bank to disclose to the auction purchaser any material defect in the title, failing which it could be construed that the purchaser was misled.
Therefore you may approach high couirt with a writ petition as suggested.