FNB don't care and don't know service

Hi have never in my entire life experience such poor service from any one like I have at FNB. We have sent in signatory changes the 15 September 2021 and after multiple phone calls and and emails it's still not done and today it's the 26 Nov. We are a business and no business expenses has been paid for the past two months. I am so disgusted by the level of care that FNB has displayed. I have emailed the complaints department multiple time but that does not even help. I am disgusted by the service and empathy.