FNB homeloans ignoring my emails

My personal account was not debited on the 31st October 2021 , as a result a transfer amount for the respective month was made by myself from the cheque account into the homeloans account to update payment into the account. On the 2nd November FNB homeloans then debited my account for the same amount. The additional payment reflects on the FNB app under "access funds/flexi funds". Realizing that I was unable to access the funds, I tried to reach out to FNB homeloans through an email. I wrote an email to *** on the 8th November at 07h24 to request a reversal of one of the payments. I received an automated response stating a response within 24hrs. I wrote a follow-up email on the 10th at 07h59 and was met with the same automated response, another email was written on the 10th at 12h31 and again an automated response. Your lack of response is no less than inferior service and if need be I will move this account to service providers who take their customers seriously.