New Account - but wrong surname and details!

I opened a new Donna account with TFG. I was quite impressed with the process. Filled in everything online, got an sms to send supporting docs to an email address and a very quick response to approve my account. I went to the store with my ID and got my new card.

A month later I had to contact customer service, just to find out that my surname is incorrect. Somehow it picked up a very old account that was closed 8 years ago and has my ****en name linked to it. Customer service informed me that I need to go into the store with my ID to correct this. I feel this is unacceptable. I app**** for a NEW account. All the info provided was correct. The supporting documentation was correct. TFG is in possession of all my supporting docs with the CORRECT surname, why should I be inconvenienced to go back into the store to correct this when the problem was on your side? It doesn't make me feel very comfortable with a financial service provider if they did not double check the documents received. They should not just have taken an old profile on the system. I would like my details corrected as this was a fault on TFG's side. I tried to speak to the consultant over the phone and I sent a complaint to your customer service with no luck.