Mr Mahinder !
You have availed the Gold Loan, this fact is admitted
You have recived a Notice on bhalf of the Bank ,
whether any reply /representation is given by you to the bank /or not is not mentioned .-You should have replied the Notice .
However the Gold articles are sold , the particulars are not given by Bank to You .
You are suggested to address a letter to the Bank requring the Bank to furnish all the details of the Gold Laon Account and Security sold , Sale proceeds , and its appropriation by Bank towars repayment of the Gold Loan Account and any surplus amount remained with the Bank payable to you .The Dates of Notice/s and date of Sale etc- particulars are not mentioned in you query .
After receiving a Letter /reply from Bank you can properly take a decision regarding going to Consumer Forum / or Court .