Poor service delivery - lack of communication

I was pre-approved for a credit card limit increase which I then app**** for. I was asked to send supporting documents and I then received the "actual offer" where I had to review documents and accept the terms which I did. I then received communication advising that I need to accept the debit order mandate with my bank before the funds will be made available. I phoned African Bank to advise that I had not received this instruction from my bank to accept. On the very dame day of me phoning, I received communication that my application was unsuccessful which does not make any sense since I had already received the actual offer and I had accepted the terms and conditions. I then phoned customer service as I was highly annoyed having already waited so long to get anywhere with this approval. I was told to re-apply which made me even more upset. Then I was told to speak to customer service and ask for a supervisor who must re-activate my previous application. I was then told that this person "Lucky" will phone me right back. This was 14/04. I waited some time and decided to send an email with my complaint and needless to say, I am STILL waiting for someone to phone me and give me an explanation. Unacceptable service delivery.