No consent to contact me and rude consultant shouting at me

Was given a call today by a very rude consultant,i asked where he got my number and he could not answer and kept telling me about their ncr number,which does not make a difference,because as per the law a person must give a company permission to contact them or to access my information.Instead of the consultant apologizing he carried on shouting and then cut the call.I think companies that contact people without their consent should be reported and closed down as this is harrassment. With a company with such consultants that call someone that did not even make an inquiry for that consultant to shout at me for calling me i would say is the worst debt counselling company in south africa and consumers must be very scared to sign up with them as they are not professional at all.The next time someone contact me from that company without my consent i will report them to the ncr and i think many others should do the same