Airtel — Abusing language on call

sir, my name is nikku kumar . sir i have received a call from [protected] . 2 months and he is disturb to my wife on her number [protected] and now i broke my wife mobile number and now he is calling on my number . i said him that " mein police mein compalin kar dunga so he said police kya uthar legi mera " that kind of language he is use and calling in day and night also disturb by message i also have a recording of conversation and screen shot of message . so kindly request you do some thing sir. otherwise advise me what to do . nikku kumar [protected] any information please help me . thanking you sir