Poor service from Premier Banking\Revolving loans Team

There were pre approved loan offers on my online banking. On 18th Sep I decided to click on the pre approved revolving loan offer to check what interest rate I would qualify for and if it would be worthwhile to take up the offer to close off my other accounts. The system sent me a debicheck mandate which I declined because I wanted to obtain settlement letters on my other accounts before accepting the revolving loan offer from FNB. I assumed FNB would be able to simply resend the debicheck mandate once I was ready to complete my application. Since the 18th of September I have been calling FNB every two days to get some traction on the application. I keep getting routed to the Premier Banking Team who don't seem to have full visibility on my application. Every time I call in and speak to a Premier Banker, they promise to take ownership of my query and follow up with the Revolving loan team. I have spoken to around six different Premier Bankers since the 18th Sep but none of them have returned my calls or given me any feedback on my query. It seems like teams in FNB are not collaborating and don't value customer service. The Premier banking team makes empty promises to follow up and provide feedback however when it comes to the end of the day your case is closed and you are forgotten. I am seriously considering changing banks. They need to change their slogan because they clearly don't care about customer service and disregard complaints and escalations.