I'm scared for mine and my kids lives

Today 25th April I received treatning calls from a guy from pro roof steel hussen treating me that and my kids lives that they want to kill me and my kids and run my husband out of johannesburg libecause they owe my husband lots of money for jobs was done in February and chemicals and bin bags was suplied to them they refuse to pay the money so the owner Rafiq Mohammed fired him because they refuse to pay him