Hi,
The shipping plugin name is no displayed by HikaShop anywhere on the frontend. At least, as far as I know. It's always the shipping method name that is displayed, and that can be modified when you edit it via the System>Shipping methods menu in the backend.
I see that you have a subscription for HikaMarket. Are you talking about some part of the frontend handled by HikaMarket ? Could you provide more information on your question ? Maybe some screenshots and / or URLs of the pages where you want to change that ?