Telephonic harassment

Firstly, to the Nimble Group, you should be ashamed of your low Trust index rating. A family member of mine has an arrears account at Capitec. Nimble somehow got my cell number, and from April 2023 they have harassed me non stop. I explained to them on numerous occasions that I am not the person they are looking for. I gave them the relevant contact numbers and literally begged them to stop calling me. These call have not abated in any way. Just today my Blocked Call history shows that they tried 3 times to get hold of me. If my family member does not care to engage with the Nimble group, what the hell do they expect from me by harassing me every day?