WORST SERVICE EVER

worst banking experience the last 2 months now. Change my surname on their system without my knowledge. When complaining was told to go to a branch with my ID to change back to original surname. How did they change it then? My debit order date gets changed as they feel like it and also the amount. Their customer service phones back when it suites them. I am at the point that I am closing this account and invoice them for the amount of time that I've spend on phone calls and my time. If there was a 0 , I would rate their service a naught. Customer service personnel do not have the knowledge to assist upset customers. I am a VERY UNHAPPY CUSTOMER. Been with them for more than 4 years but this was the last straw.