Hi,
Please edit the HikaMarket "order_status_notification" preload and change the line (near the end of the file)
} elseif(!empty($data->order_shipping_id) && !empty($data->cart->shipping_address)) {
By
} elseif(!empty($data->cart->order_shipping_id) && !empty($data->cart->shipping_address)) {
I think that when the email is send, the HikaMarket sub-sale is not load/modify entirely and the information "order_shipping_id" is not available directly in the object "$data" ; but it would be in the "$data->cart".
You can perform a edition of the email using the HikaShop Business interface or you can modify directly the file using FTP (media/com_hikamarket/mail/order_status_notification.preload.php).
The next HikaMarket release will have that patch (if you right confirm that it fix the issue).
Regards,