You said that you have filed a money recovery suit on the basis of cancellation of the sale agreement, if that is the case there is no question of seeking to execute the registered sale deed enforcing the unregistered sale agreement under specific performance of contract.
Your post from one to another contradicts your own statements, hence don't be confused or confuse the experts here by asking contridicting questions. If you want to produce the sale agreement as documentary evidence in the money suit, there is no bar to rely upon the same as your side evidence.
If you decide to file a suit for specific performance of contract then you may have tio withdraw this current money reovery suit filed by you and of course the suit for pecific performance of contracte on the basis of the unregistered sale agreement will be maintainable to the extent of return of the advance amount alone.
The Supreme Court has ruled that an unregistered agreement to sell can be admitted as evidence to prove the existence of a contract in a suit for specific performance but it is not admitted in the judgment thqt the unregistered sale agreement is enforceable
This decision was based on the proviso to Section 49 of the Registration Act, 1908, however it essentially states that such documents, if not registered, cannot affect any immovable property comprised in the document or be received as evidence of any transaction affecting that property.
In simpler terms, an unregistered document that requires registration is not legally valid to transfer ownership of immovable property, and it cannot be used as evidence to prove a transaction related to that property.
Your further contradicting questin is about approaching consumer commission to get your grievances redressed which is totally contrary to your primary question.
Ascertain the facts and then come out with your actual problem and not with predetermined suggestions