Nedbank Credit Card Department is useless and pathetic

With Nedbank credit card increasing the % of repayment on their credit card - i did not receive my statement for my July payment and just paid an amount over (a little more than usual). On 26/08/2021 i requested the settlement on my nedbank credit card which i obviously waited forever for. on 30/08/2021 i received a call from nedbank at 20h53 to inform my that my full payment wasn't received and that i should make immediate payment. i followe up about my settlement amount every day since 26/08/2021. A manager Celeste Stanley responded to me eventually. On 31/08/2021 after the late call from nedbank on 30/08/2021 i send her an email complaining that i still have not receveived my settlement amount. She rep**** on my email with a settlement amount - which i paid. On 02/09/2021 Nedbank send me a settlement letter - which is obviously more than what i was told and paid on 31/08/2021. Yesterday i received an email from Celeste i have to pay the difference.

i refuse. i have it black on white on email that she send me the settlement amount that was paid that same day. it is not my problem if nedbank's service is so pathetic that it takes them a week to send out a settlement letter. how can my settlement be 1 amount on 31/08/2021 and on 02/09/2021 it is more.

Celeste can pay this difference as i received the settlement amount from her on 31/08/2021.

Nedbank's service is pathetic and i will never go back to nedbank again.

Nedbank have to sort out this difference in the settlement amount that i received between 31/08/2021 and 02/09/2021 - i will not pay it as it is not my problem if they are too useless to do their work.