Harrassment calls from NBA

This company must STOP harrasing me. They have a nerve to call me after 7pm, before 7:30am and anytime they feel like even after I told them im not the person they are looking for. I gave them the persons contact number 2 times already but they harrass me instead. I am not Fezeka Katiti. NBA must learn to update their information. I dont know how many different contact numbers i blocked from them, i lost count, simply because i told them i am not the person they are looking for. Now i want proof from NBA and Cell C that Fezeka added me as next of kin because that is highly impossible.