Atrocious Service from Standard Bank

I've been trying to close my credit card account for over a month. Paid up additional & unnecessary charges. Their security questions (to apparently validate who I am, despite checking my ID etc) is totally arbitrary and appears to be date specific - they keep asking me to either go to a branch (which is difficult to access) or call back. I have never experienced such shoddy service. - therefore my decision to never deal with this bank again. I called the complaints line this morning and was told that another security check will be done and I would need to call back on Monday! Hope this complaint reaches the right ears...Fed Up.