Rude staff and harrassment

I have been getting sms' and calls from MBD credit solutions looking for a Xoliswa Hoza, and I have informed them that I do not know a Xoliswa, and I wish my number to be removed from their system. Initially when I asked the person who called me to do this it never happened, and so I called on work landline, I called them on (011) ********** , for reference ********** ********** 10, and I asked this guy i talked to to assist in removing the number from their system, he said it is done with an attitude, and I asked for a reference, 7 5 66116, but then soon after I received these calls on my landline from very rude individuals. They kept calling and one of the ladies that called had the nerve of dropping the phone while i was talking trying to explain I am not the person they want, also bear in mind when I picked up my phone she addressed me as Xoliswa, and I am a male, I am quite sure she could hear she was chatting to a man. The manner in which they talk to their clients is despicable. I asked her if the number she was calling was what Xoliswa gave her, she said it is alternative number. Before Capitec gives people credit dont they verify, because I feel my rights are being infringed and the call centre staff at MBD cares less because they are just doing a job so they can eat, so must I be polite when someone calls me chewing bubblegum? I have had enough, I have asked them over and over again to stop, even went as far as blocking all incoming calls Could someone step in, I have given you the references, if I get one call from MBD I will escalate the matter to my lawyers and let you deal with them, I am not Xoliswa and do not know a Xoliswa.