Hello,
Best in such case would be to use the "return URL" of your payment instances.
So you will redirect to different pages depending the method.
Otherwise, you can see to customize the "checkout / end" view and add some custom PHP to analyse the order and the used payment method.
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.