Airtel
Threatning calls

I am holding reliance connection No 9345419398, My wife and daugther are hutch connection and they are also employed. All 3 of us are repeadely getting threatning as well as vulgar language abuse not only during night hoiurs but also during day time of late. The Number from which we get this call is 9731140864. I have also lodged a police complaint on 14th May. I am unable to understand how this can be stopped. Please advice.