Land site registered in my name but does not have katha

I had bought a land of 60x40 from my relative( seller) in mysore and it is registered in my name. My relative ( seller) has a site in front of our site. But later I realised that my site does not have katha. When enquired about this to my relative he said even his own site does not have katha and he will set it right. Later on after few years he said katha has been issued to the both site ( mine and his).But so far he has not given us any katha. He has given my site to builders without my consent . He says he has katha done for our site in his name. So can we legally proceed against him?