FNB Poor service delivery

Good day

I logged a request for my RCP to be increased more than a month ago online. I have received no feedback from any consultant from FNB sales. I think tried again and it said declined because I already logged a request. More than a month later, I decided to call the Sales Department for assistance (8 August 2020). I was told to wait 3 days for feedback. Today is the 15th and still no one has gotten back to me. I called again today, and apparently the request was not put through. How does one resolve this if I have made numerous attempts to get into contact but there has been nothing from FNB side. This is terrible service and will be losing clients as this is not the first review regarding poor service from the bank.