Why you remove questions which say that theme have serious problems? I wait more than 1 month!
Hello Alex,
First of all let me tell you that this is not our theme or plugin issue. As you said you lives in Thailand were internet is very slow. So, I am sure that is the real issue.
As you said earlier that you can upload image but not user. To verify that we tested upload functionality in your site as admin and normal user in all browsers and OS and it works without an issue.
As this issue is due to slow connection of your user.
Hence we are not able to help. Please request a refund from PayPal.