Why did Tamanna Bhatia got banned in Bollywood?

Tamanna Bhatia got banned in Bollywood ? Not exactly she is stopped appearing in main movies, well the entire Bollywood is controlled by very few powerful families , and anybody who goes against them will not get  not get roles in the main stream media, how every she is very well dominated in the south movie industry. and south movie industry is as big as Bollywood now .