Bhattacharya was not given credit for Khan's songs in the films Main Hoon Na and Om Shanti Om.
He told Hindustan Times: "I don't know why our filmmakers never give singers due credit. During the end credits of Main Hoon Na, the singers' names appeared right at the end.
"Worst still, segments were shot with the chaiwalas and dressmen, but not with singers. My family saw the film and felt betrayed.
"The same happened with Om Shanti Om. And here I am... Shah Rukh Khan's voice! I conveyed my disappointment to Farah Khan and Shah Rukh Khan."
In October, Khan accused journalists of stirring up controversy about his personal and public life.
The Bollywood veteran later commented that the public "don't know him", despite his long career in the industry.