MBD are harassers

MBD are harassers. They call me multiple times a day from as early as 7am asking to speak to Tsholofelo who i have never heard of. Ive been asking them repeatedly to delete my number from their system but they dont. I called customer service and they also refused to delete the number and told me to write an email. This is a violation of POPIA. Why would I give them any of my personal details when i have no relationship with them? So that they misuse it?