Hi,
You can edit your customer in the HikaShop backend.
And if you want to re-send an order email, you have the "email" button in the toolbar when you look at an order, in the HikaShop backend ; in that interface you can also send the email to another address.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.