'Vishwatma' director Rajiv Rai has threatened to take legal action against Dharma Productions and Saregama music label over alleged unauthorised use of 'Saat Samundar' in 'Tu Meri Main Tera Main Tera Tu Meri'. "They can't use the beats like this, especially when nobody asked for my permission," he said. Rajiv said his legal team will approach producer Karan Johar.