Over a month for a pre-registered future-use amount on our bond, still not finalized

Its taken over a month to finalize a future-use application for solar energy. I complained about the slow service through the complaints portal. They then had Evidence Nyoni assigned to me, the supposed sales and service manager, to assist with better service. There was no change in service, they seemed to drag there feet even more. I sent the request to my private banker on the 4th July, I had to then complain in order to even get a response. over a month later, I'm still practically begging for feedback. They had me increase my property insurance on 31 July 2023, and now they drag their feet for another week! For some unknown reason, they complicated the whole process forcing me to first re-advance the bond, and only after that will they sort out the Future-use/Solar energy. The re-advance took 3 weeks just to finalize, and they quietly tried to change our bond term from 20 years to 30 years, increasing the interest cost by R2mil. FNB tried to ***** R2 mil from us! And now if I try to call Evidence she doesn't answer. Meanwhile the quotation for the solar expired they took so long. Other banks have completed this process in 2 days. If FNB does not finalize my application today then I'm taking all my debt to another bank. this is the last time that I take MY TIME to share with FNB management, how bad of a service their staff are putting out there. This is the last change you have to prove you can provide a service that's worth the R450 I'm charged for every month for this service I don't receive.