Incorrect credit card payment

<p>I paid a suplier via my credit card in Botswana Pula and you debited me over R500 more on the card than what the exchange rate was on the day. I emailed you and a Client Services Resolution Manager advised me the exchange rate was R1.3246 on the day payment was made however the Botswana Pula to Rand exchange has not been above R1.30 in the entire 2017. I have been awaiting a response from this manager since the 7th of July and am quite disapointed in the service i have recieved.</p>