Harrassment from call agents

I have been harassed by your callers from Cell C Direct. The No. are 084 145; 084 140; 084 135. I have call list dating back months of receiving these calls. yesterday I got 5 calls(30/11/2022), the day before 3 calls, and so on. I have a recording from his call this morning again where he insults me and refuses to give me his name.To my knowledge this is ******* and amounts to harassment. stop calling me!!!!!!