A mortgage is a security interest in real property held by a lender as a security for a debt, usually a loan of money. A mortgage in itself is not a debt, it is the lender's security for a debt. It is a transfer of an interest in land (or the equivalent) from the owner to the mortgage lender, on the condition that this interest will be returned to the owner when the terms of the mortgage have been satisfied or performed. In other words, the mortgage is a security for the loan that the lender makes to the borrower.
In a mortgage by legal charge or technically "a charge by deed expressed to be by way of legal mortgage", the debtor remains the legal owner of the property, but the creditor gains sufficient rights over it to enable them to enforce their security, such as a right to take possession of the property or sell it.
In most jurisdictions, a lender may foreclose on the mortgaged property if certain conditions—principally, non-payment of the mortgage loan – apply. Subject to local legal requirements, the property may then be sold. Any amounts received from the sale (net of costs) are applied to the original debt.
Right of mortgagor to redeem:-
At any time after the principal money has become due, the mortgagor has a right, on payment or tender, at a proper time and place, of the mortgage-money, to require the mortgagee (a) to deliver to the mortgagor the mortgage-deed and all documents relating to the mortgaged property which are in the possession or power of the mortgagee, (b) where the mortgagee is in possession of the mortgaged property, to deliver possession thereof to the mortgagor, and (c) at the cost of the mortgagor either to re-transfer the mortgaged property to him or to such third person as he may direct, or to execute and (where the mortgage has been effected by a registered instrument) to have registered an acknowledgement in writing that any right in derogation of his interest transferred to the mortgagee has been extinguished:
PROVIDED that the right conferred by this section has not been extinguished by the act of the parties or by decree of a court.
As per the provisions of the Limitation Act, 1963, the time limit prescribed to institute a suit for possession for enforcing a right relating to an immovable property is 12 years.
If you still feel that you would like to retrieve the proeprty for the aid reason you can file suit under section 34 of specific relief act.