Credit Card Payment Missing

FNB deducted R**** debit order towards my credit card and now they claim they can't find the money. The claim that the debit didnt go through. I have email notification showing that the payment went through my cheque account. I even transferred money out of the credit card to my cheque card 2 days later. FNB sent me an sms notification thanking m3 for my payment on the 20th Aug and on the 21st they started harrassing me for non-payment. I went into one of the branches yesterday and the lady I spoke to from the Credit card division told me that the notifications I received were an error...yet my bank balance wasnt adjusted. Someone competent enough to resolve this issue. I am absolutely annoyed at the level of service and unprofessionalism of the credit card division personnel. Their tone of voice when speaking to me was appalling as well. I want this resolved urgently!!!!...