TwentySixHundred

I have and yeah im assuming they're Chinese due to the email header having Asian characters.

That's the biggest issue as the missing parts are the only parts worth anything. The case they sent does have separate listings to buy individually at a fraction of the price.

Im assuming they only want to refund 35% to cover what their local postage costs were. As it was free shipping but that's common here in Australia even if they imported it from China. Due to the trade agreement between the countries.

You could be right about language barrier though, as their emails are very copy and paste style with even quotations at the start and end of message. Probably have no real idea what im actually requesting.

I've usually had good luck dealing with the Chinese, but sometimes... weird things...I once got an item, it worked, then they asked if I'd received it, saying some people hadn't gotten theirs or something.   I said Yes, and gave positive feedback.  Then they sent another email asking if I'd received it.  Then another...haha...They probably just still had me on the list or something... 

First time i have any issues with the Chinese too. It's just this seller seems to want me to give in and just take the partial refund rather than just sending the missing parts. Told them like 4 times to send the parts and are still responding with "sorry what would you like us to do to rectify the issue"... Their listing price is still half price now as to what i paid. No idea why they slashed the price other than maybe they don't actually have the stock on hand.