Bad Service FNB Credit Card

On 16/07/18 my account was debited however I have requested for my debit order to be dedudcted on 20th of every month.I phoned on 16/07/18 after payment went through to change my debit order date to 0th and spoke to Rabalani who assured me all is done and all will be well. I phoned on Tuesday 24 /07/18 and now spoke to someone who advised i need to sent a email to collectionsqueries to ask for my account to be updated. I did sent the email however i have not received a reply either by phone or email confirming request. I then phoned again on the 27/07/18 and spoke to Naledi who advised me the same. I requested to speak to a Team Leader and she transfers my call to the general inquiries line and not a Team Leader. I called back and spoke to Odiel who advised "unfortunately she doesn't know who i can speak to in the other dept and what is that i want her to do about my query,as I just have to wait for them to work on the email I have sent. She ends the call with "buy". How professional is this? Is this the kind of service you are giving your clients? I phoned to change a debit order date - a simple request and my account ends up being locked, in arrears and in Collections as if i did not pay my account. Now my record to FNB reflects I am a bad payer as my account ended dup in Collections. This is unacceptable service. This is staff on the phone who does not know how to speak to Customers. I expect someone to get back to me asap.