closure of account

I haven an account with African Bank and got an settlement amount in March2021 on the 8/3/2021 I have paid this account through Absa Bank with and EFT and I have making enquiries about this payment that they cannot found. Till today they say they cannot find this payment, How is this possible . I can not get anyone that will go out of there way to assist me. I have ask to me to an Manager but no reply.