FNB CREDIT CARD PAYMENT DRAMA

I've been trying to pay my fnb credit card for the past month literally!! Im unable to transfer money fromy bank acc to the credit card : I've tried online transfers, tried depositing into the credit acc all to no avail. I contacted fnb telephonically so many times seeking assistance and they weren't able to give me answers as to why I still can't pay electronically for my credit card. All the whie, I also contacted fnb by mail seeking assistance. I filled out debit order forms, as instructed by fnb, to ensure that payment goes trough by 31 July. Even called FNB on 30 July to confirm the existence of the debit order that is to go off on 31 July, the lady kindly confirmed the debit order but gave me an account to deposit into should the debit order not go off. Lo and behold, the debit order didn't go off. I called FNB, but they weren't able to verify me using the app so the agent wasn't very helpful. I tried again to make a deposit into the account number given to me, still getting an error. I then emailed FNB (on 31 July) asking them to implement the debit order and recieved no response (other than the automated response). I emailed again on 1 August seeking some resolution.... I'm still waiting. All the while, FNB keeps instructing me to pay my overdue credit card account daily by texts. The way I'm sooooo tired of calling and sending mails about this issue! Fnb seems unbothered by it so this is my last effort to get a resolution for this matter. My goodness!!