HiFi review: settlement of an account [protected]

I went to the store on the 02/02/2020 to settle my account and i was advised to go to customer service in order for them to check for how much i owe in order for me to settle.

I was told to pay R 22 779.99 as my settlement amount and i was advised to phone the head-office in order to have my debit order cancelled and also to get a settlement letter. on the 05/02/2020 i phone the head-office and i spoke to a lady by the name of Brenda Hlalile, who was very rude and when i asked questions the only answer i would receive from her is "i don't know" and i must go the branch to ask tell them why i was told the pay that amount, i responded to say because i have the name of the person that assisted me, she can rather phone them and inquire. I was told that must go to the branch and the person that said i must pay this amount will answer to that. My question is if why are we not given the same customer service we receive when we take credit. As for the Brenda Hlalile should be taken to customer service course, cause if your a stressed customer and she happen to pick up your call she does not speak well with people, she has attitude. Looking forward to your response.