Society comittee not allowing me to sell the flat

Hello Sir,

My Name is Prashant Shivmath, My elder brother is owner of flat at Bhayender,  We have taken the tokent amount to sell the flat, But society commitee not allowing me to sell the flat, They are saying, We are not allowing outsider agent to sell your flat.. They are saying We will not give the NOC letter and also told us they will create the problem to new buyer..

And for second flat which is owned by me, one side is opened at the road side on which builder has put the shutter for us to use during under construction building it self. I want to sell my flat as well but the society is saying, You have to break your shutter and build the wall and sell the flat.. I didn't understand flat is build  by bulder how come the society force me to build a wall for new buyer for sell..They are creating lots of problem'

Kindly help us, Should I go ahead and lodge a complaint against them...

Appreciated your immediate help..

Kind Regards

Prashant