Uh-oh. Contact the seller. Was it sealed that way? Like, was there an external container that contained all six together?

Contact the seller and show them a picture of all 6 boxes to verify that you accidentally received an error.
Also, don't open them until they re-contact you with possible steps in solving it. If it was a box set, for example, they may ask you to return the box and they'll ship you out an entirely new box with the correct items.
(I don't know who you ordered it from, so I can't guarantee their policies, so take every precaution)

Yeah, it was a sealed 6 box set. Thanks for the advice, I'll try and follow that up.

Modded it
 

Hey guys!

I managed to mod my Kurenoh so it has actual hands now!

I used MG Gundam hands, they just pop right in- easy peezy.

Then I transferred the voyager heads to the holes in his back- perfect fit.

So much happier with it now. ^_^

Aw, look at his cute little hands. I don't know why Kyurenoh would need hands but good job.

TY lol

To scratch his bum.

First picture for the third series of kyuranger minipla : ryuteioh.

5 boxes : 3 for the dragon voyager, 1 for bear voyager and 1 for scorpio voyager.

Selling date : may 2nd.

https://i.imgur.com/zlAVFFnl.jpg

Bear looks super clunky as an arm.

OK, so update on box: I've had some email back and forth and can get a replacement. Will have to send it back to Japan though, so may take some time.

Will probably get vol 3 then. May pass on vol 2 as this gets me Sasori and I don't really care about Tenbin or Hebitsukai.