Customer service

I went to soshanguve crossing to advice them to change my date of debit orders as i know ive changed jobs and this guy never bother to assist me even further he went on saying they cant change my date of debit orders and they said i need to come with a letter from my employer. And the service its terrible and they need to train those guys. Im not happy now the debit orders will bounce who is going to pay for those charges.its unfair to wait long queue while they are having chats about their boyfriends And girlfriends and they dont render the service.