The Bank will laugh at you should you go to Hallo Peter. Hallo Peter has its own bad reputation to sort out. Take it to the corrct authority, namely, the banking Ombud. Every complaint is properly investigated, and then gazetted.

From the ombud you can take it to the NCR.

Once you get the ruling you can advertise the findings in all the newletters, blogs and webpages you can find. A much better solution.