African Bank rude behaviour and possess personal information of people that does not bank there.

African Bank called me at 09:48 on the following number ********** . When I asked were they got my number the person said from the information department and he rudely continues talking while I try to figure out were African Bank got my number because I dont bank with them so how did they get my personal details? And when I asked it the person rudely hang up the phone. African bank personal is rude, does not know how to be professional and has no work ethic. I still want to know where did African bank get my personal information.