You have not mentioned details about the lease deed.
First - is the lease deed stamped properly and registered? If it is not, then it can be questioned in the court and can be proved to be invalid if other conditions are also in your favour e.g. appropriate consideration was not paid, etc.
If the lease deed was registered, then you cannot claim that the person had any "evil intentions" or that he took your signatures without your consent. The office of the registrar require witnesses and takes your photographs, etc during registration.
In any case, if the consideration was not commensurate to the rights given, you may be able to win your case. However, if the amount of consideration is appropriate, then you cannot hide behind your ignorance or that you feel cheated after surrendering your property on lease.