Unbelievably bad

Standard Bank claim they don't negotiate home loan rates after the bond is registered. We were at the mercy of Standard Bank at the time we bought our property because we already had 2 bonds with our primary bank, Absa, and they wouldn't give us our needed 90% bond, which Standard were willing to, but at a very high interest rate. We've been diligently paying our homeloan for over 2 years, have an excellent credit rating, our property has appreciated by 50% in 2 years. Our income is significantly more, and we want to extend the bond to do renovations. We also no longer have 2 other bonds with Absa, so they are willing for us to switch for a better rate, but Standard are not interested at all in our story, or even entertaining the idea of giving us a better rate. I was willing to move all my banking to them, but still they don't give a damn. So...I have no problem giving notice to cancel the bond. Bye bye Standard... If anyone cares, now you know why!