sick and tired of african bank

I keep telling this bank to stop calling and wanting to confirm employment and harassing me. They are so stupid they call on my line to ask if I am working here .I told the previous caller that it is ******** to call my company and ask personal details about me, especially that I did not give them permission to do so. Again today another person called, when I asked her who her client was , she said me , to which I responded how is that possible when I dont know that i gave permission for you to contact my company , i have no more dealings with you, she just said that she was not the previous caller.I am so sick and tired of these fools.I am laying a complaint against them as they keep bridging my rights , and I have advised them of this before.they call from a number *** .And surprisingly, when you go onto their website, the do not have a button for complaints.