Dell Missing Accessories From Box - Purchased From Grays Online

Hello all, I just want to get your opinion on something. I am upset now, so I may be not thinking clearly, I may be just a moron…

I bought a Dell dual monitor stand from Grays Online. The description of the item says:

Dell ( HXDW0 ) MDS14 Dual Monitor Stand
Silver/Black
Stand Supports Two Monitors Up To 24-Inches In Size
MDS14 Dual Monitor Stand Is Designed To Maximize Your Viewing Comfort And Improve Your Productivity With Its Multi-Adjustment Capabilities Such As Tilt, Swivel, Height Adjust And Horizontally Slide The Monitors On The Stand
It Can Easily Snap On Two Dell Monitor Panels With VESA Support And Enjoy Improved Productivity And A Clutter-Free Desktop
( P/N: HXDW0) (239949-104)
GST Note: GST is included in the final bid price of this item. GST is included in the freight and buyers premium.
Condition: Resealed

RESEALED means

Products listed as 'Resealed' have not been sold to a consumer. Items will generally still have their original packaging but it may have been opened for testing or other purposes. In some instances accessories may vary from the standard (for example, software or manuals may be missing or different).

The description from Dell says

The two adapters provided on the stand, assured that the dual monitor stand can attach to any VESA compliant monitor.

I received the box without any adapters, spacers or screws, all of them should have been in the box (by my logic). I contacted the seller and:
1) first they said a refund is in order, I was fine with that
2) they said that the box should contain no adapters => no refund
3) after me showing them what the box should contain adapters, spacers and screws, they say that because they did not mention the adapters being there => no refund

I went to Fair Trade and they just told me that Grays says that the stand was advertised as a Dell monitor stand and that it can be used with different brand monitors but special brackets are required which can be purchased separately. I believe they are again misrepresenting what it should be there. The brackets are not "special", and they should be in the box.

For me this is like selling a PC with a GPU that needs a PCIe cable but the PSU does not have a PCIe cable. The PC works fine if you use the included IGP, everything that is on the ad is there, you cannot use the GPU but the ad is correct.
It is like the PC has an SSD and a HDD, however only the HDD has a SATA cable, does everything work? sure, the ad did not say the cable was there so…. no cable.

I believe there should be an expectation of what the add should say, they clearly had no idea what should have been in the box so they did not include anything missing in the add. I did my due diligence, I researched the product, I knew it should work with any monitor so I bid on it with the expectation that the spacers, adapters and screws to be there.

So now my only recourse is to pay 48 AUD to have my case heard in court. It is obviously a waste on my time and money, a waste on the courts time because the value of the product is around 110 AUD. However I feel that they are counting on this, on me doing nothing. Logic says let it go and never ever touch anything from Grays ever again.

So am I right to expect the box to be complete or are they right because they did not mention the adapters would be there?

Thank you.