Interest keeps being charged on a loan I have settled

I seelted my loan but nedbank is not willing to close it . It is my second time wanting a hellopeter complain about Nedbank but is seems to me as if Nedbank doesn’t even take their customer complaints seriously aswell . Interest keeps being charged on a loan I have already settled . I feel so helpless as no1 is willing to assist me . My number is *** . Can nedbank please call me .