Update: ANZ called again today and I was not able to answer the phone. So this time, instead of responding to their message, I took the advice of
@Cessna 180 and called their credit card line. The 13 number had a recorded message and it said that they are not able to take any calls at the moment (strange?!?!) and the call automatically disconnected.
So I launched the ANZ app, hit the "Call Us" menu option, which launches the 03 number, with some prefilled IVR options. So after a 20 minute wait, the call was answered by someone, who asked why I was calling and I started explaining (venting out my frustration, more like) why ... the agent on the phone started to interrupt me at every turn. I politely asked not to be interrupted please, and she was like "wow, okie" ... then when I was done she asked what my name was. I replied and she put me thru to CC section.
The call was answered by a lovely person, Siddi, who completely understood and appreciated my frustration with the whole process and how ridiculoulsy long it has taken to approve a CC for $6000 limit. She apologized and recognized that it will be frustrating to go thru what I'm going thru and she ensured that she will take it over from here. She put me on hold when she went thru my application in detail (took about 10 mins on hold) and told me that everything looks good, except for my income which she'd have discuss with her supervisor. She promised to give me a call once she has had that discussion with her supervisor. And she kept up her promise. She called at 1530 as promised and explained that she will still need to see one more payslip (for Feb) and then it should be easy.
I recently changed contracts, so I understand where she was coming from. See, it would have been easier if in any of the 20 odd calls that ANZ attempted to contact me, someone mentioned this is what they are after and it would have been easier.
I understand and acknowledge that banks have to do their due diligence before issuing a credit card, but it would be great if the customer kept across what's needed, rather ask when to call and never call.
Anyways, now I need to wait for the Feb pay slip and hopefully the card will be approved 1st week of March.