Can call recordings be used as evidence in court

maine apne sasuraal walon per dowry ka case kiya hua hai, mere pass kuch sabut hai jisse main ye sabit kar sakti hoon ki mere sasuraal walon ne dahej manga tha mujhse. mere pass kuch call recordings hai. per ek problem hai ki mere husband ne humesha office ke landline number se call kiya our paise maange uski recording mere pass hai our maine mere sasuraal main rehkar ek recording ki thi jismain meri saas mujhe paise lane ke liye bol rahi hai , kya ye dono hi legal hai court main. office ke landline number ki recording our ghar main rehkar jo recording ki hai kya court use manegi. dusra question hai ki mere husband ne mere khilaf ek nc karvai thi our woh nc mere sasuraal ke police station main ki gayi hai. mere husband ki kuch police walon se achi pehchaan hone ki vajah se mujhe nc ki copy nahi mil rahi. finally maine RTI main request ki hai per 2 month ho gaye abhi tak kuch nahi hua. kya RTI court main legal hai.