Nedbank is sneaky

My husband and I went to apply for a re-advance on our old bond to put it through on our new bond. We did this basically so that we could claim the interest on our tax as we are renting out our house(old bond). When we initially went to enquire about this we worked out that we will have a saving of about R400. We went to sign today and was shocked to see that we will be paying R900 extra! When we enquire about this we were told that Nedbank increased our interest rate! Both my husband and I got bank accounts with Nedbank. We opened an savings account for our savings at nedbank. We opened an account for my daughter at Nedbank. Both our bonds is at nedbank. Unfortunately I just lost all trust in Nedbank. I will start looking around to move all the above mentioned to a competitor. I am very disappointed with this as I always told everyone what great bank Nedbank is.