Very poor service from Discovery Bank

I have held a Platinum Discovery Credit Card for a number of years and when it was linked to FNB it was a breeze to sort out issues. I opened a Bank Account with Discovery and the Card was moved to the Discovery Application from FNB. I have made two manual payments from FNB into the Discovery Credit Card. Both times when I used the FNB online system I used the Public Beneficiary selection that is available on the FNB website. It insists that you use the Credit Card number which I did. I have had problems both times and when speaking to the Discovery Bank helpline they say I have to create a beneficiary and use the account number. I will do this the next time. I do however now have the problem whereby I made a payment on the 26th of August from my my FNB Account to the Discovery Credit Card. I have spoken to 3 different people on the helpline with no resolution at all. The first person I was in contact with said she would get back to me which she has not done. The last person I spoke to said that he would again escalate the issue as the second person had said they would do. In addition I requested that a Manager call me back. I have not heard anything back. The case number is ***. I really enjoy Discovery as I have been using their products for many years now but this has made me very unhappy. Kind regards, Andrew Day.