Contradictory statements based on controversy

I have a bond with Nedbank and it has my life cover for security. I phoned the bank to release the life cover and the 1st person I spoke to informed me that the bond does not have a life cover for security as the debt/bond is above R500 000 and the law requires security if the bond is below R500 000. When my broker checked my cover with liberty she found that there is a cession on my life cover. When I enquired with the bank so I can release the life cover in writing I was informed by Lungile that they will not release the life cover until I get another cover as security yet the same bank informed me that they do not require security for a bond above R500 000. Can someone get their facts right and then release my life cover because how I deal with my cover has absolutely nothing to do with the stupid bank. Each time when I deal with this bank I keep getting NO help at all.