Please get back to me

My problem with Ackermans I tried to pay more money to push my account monthly installments R300 but I sometimes pay R500 I'm confused their receipt or slip says R500 approved.iR300 instalment I want to where extra money going to because I never joined any policies with them pls do some follow up I will write you again after 7days I complained within 2 days they their investigation is closed no clear answer pls I will send account no if required but now I don't if save to so my names Bhile Stephen Mokgatle to