Bad service

I have a loan with African bank, I have settle it on 30/10/24, the I called call center to check if the loan was settled on the 13th of November, only to find out that I paid the loan in a wrong reference and I was given reference by the consultant from call centre, since on the 13th of November I keep on calling African bank to allocate the money to the right reference because they have deducted instalment from my account and I need my refund, I then decided to go and see the consultant directly from the bank at village mall in randfontein on the 27 of November, still I didn't get help, on the 4th of December I went to see a bank manager at village. While I was in the bank consultant from online call me and tell me that my query will be resolved within 24 hours. I called in again yesterday. I paid African bank 4324 Eft loan, they deducted R640 last month, now they send me again a message that the are going to deduct. I feel like African bank is in competent or something fish is happening in the call center I need my money back