Pathetic service from ABSA

Since I spent quite a lot at BP and Pick n Pay, I want to apply for BA credit card to earn some Avios points. The service from ABSA, which issues BA credit card, is so bad. The application went to nowhere, I had to send supporting documents to different emails and received no feedback. I called them several time and the call centre gave me different story every time. At the end, they told me the application was declined because the information I provided was differ from the record in their system. I had an account with them long long time ago, the information they had obliviously are outdated. Should they update the information according the documents I supp**** recently. No, they did nothing and declined my application. If not for the Avios point, I will stay away from ABSA as far as possible. I can't image such big bank's service is so pathetic.