It's not that easy for anyone to go against a big corporate like Zee.He might have waited and counted pros and cons of filing a case.Not everyone goes to police or court at the spur of the moment.So after so many years he got the time to file the case against ZEE.
Why he didn't claim anything when Ankita Lokhande casted for Pavitra Rishta she not even won that season but when Balaji and ZEE found the girl she become the face.
I think Shabina Sheema also won the season but she got the work and he not so now he filing the case if he were talented he itself make his place as he already has a credit to won the season.