Nedbank bond

I have received terrible service from Nedbank Call Centre. I have been put from on department to the next speaking more than a half an hour on the phone and yet still nothing resolved. I have been struggling since December for this matter to be escalated and resolved and yet another debit is going to go off. I have been double charged for insurance, one on my personal account and one on my bond installment. And can't seem to remove the one from my bond. I must explain myself everytime like a parrot over and over and I'm starting to get gatvol of this service.