There is no reseller system really with whois.cart. I have an extra license in my account that i haven't gotten around to using just yet (project on the backburner) that I would sell to you, but the problem is that you would be using my username and password. The best bet would be to send an e-mail to their sales/support team or make a post on their forums. Seaven is a great guy, I'm sure he can work something out with you.
You need a few more posts to recieve a PM, so I'll just post it here:
The problem with selling you my extra license is that I would have to give you my username and password to be able to download the files from the site, change the location of the cart, etc... and that is against whois.cart policy. I wish I could help but I do not want to get my carts suspended.
If you contacted him what exactly was the reason for not accepting the order? You said "they still do not accept order from my area" - did they specifically state that they will not provide their software to Indonesia? I'm just wondering if there was something else that come through on the order that made them not wish to deal with you - don't take that the wrong way, I may be completely wrong here, but we reject orders that don't look good for various reasons