Incorrect details

I got married 2 years ago and subsequently contacted my bank to change my details and issue me new bank cards on my new surname, which they did, after a month I noticed that my bank statements which were emailed to me was still under my ****en surname. I had personally gone to the Bluff branch to query this and they assurred me that all my details were updated and I should be getting my statements under the correct surname now, which to date is still incorrect. I have called numerous times to find out how I can rectify this and no one has any idea because they don't know what system the emails run off. This is highly frustrating as I have to pay for a bank statement due to the incompetance when I could just print it.