Indian Army — Not got any information about my oensiin or rejoining my duty

My father came back from army 3 years ago and before that he had completed 17 years of his service . Hr came back from army due to bad behaviout of army personnel . During his duty he suffered a hand injury and doctor denied him from doing duty but still his seniors forced him to do his duty . He was a havaldar in army with Rank no. 10135878P . Anf till this date he has not received any information about his pension or rejoining his duty.