Hello
I preordered my panda the 2017-04-28 and I have make the full payement.
Today I receve a mail That I must pay 439$ more.
But in my accaount I see nothing to pay.
And a few days ago they say me that I have nothing more to pay.

I'm the same with you, bought on 2017-04-28 and I cant see nothing to pay.
EDIT
I can see the pay order now.