[Jaccmcmcnn]

My only concern is that both are being delivered by AusPost, likely on the same day. Will contacting both companies for DNA be unadvisable?

It's no different to purely SEing a given company - never do It In close timing.

The same applies to the carrier, especially In this case being on the same day.

Do I have any other options? (Nike 6 Items of clothing ~$400, MyProtein 3 bags of protein and 1 shaker ~$200).

Given there's 10 Items that you'd like to SE In one hit, the DNA Is the only option.

Both arrived today and were left on front door step with no signature for both. Will pursue DNA for both and update.

Can say that DNA option does work for Nike Au.

@Jaccmcmcnn Any tips of advice you used when contacting CS?

They will always open an investigation, just be patient and wait until the assigned day they give you and then contact them back if no response. There isn't much se actually involved in doing Nike.