Appalling service and waste of time

I received an SMS notification on the 7th November saying “You may qualify for a limit increase on your credit card. Reply YES within 24 hours and we will call you back. Reply stop to opt out. Standard rates apply.” I rep**** immediately with ‘YES”. When I received no feedback I called the credit card division on the 14th/15th of November and went through a very long process of giving all my details over the phone which lasted about 30 mins. The consultant said I would get a response in 3-5 working days and I said that I needed an answer immediately and he said that was not possible. On the 20th November I emailed Nedbank customer service to follow up and did not receive a response so I sent another email on the 22nd November. I missed a call yesterday 27th November while I was working and received an email to say that Nedbank had called. I responded asking what the call was in connection with and received an email saying it was about my limit increase and if all was in order. I said of COURSE all is NOT in order I am STILL waiting on a response 2 weeks later. Then I was told that there is no record of my application and I now need to reapply. I find this completely unacceptable, I don’t have time or patience to repeat the process and don't understand why I, as a loyal Nedbank customer for over 10 years, need to be inconvenienced for Nedbank's incompetence!