Hi,
There is an option in HikaShop named "After a product is added to the cart", it is in the first tab (main) in the section "cart".
You can choose the performed action when a product is added to the cart.
In your case you will have to select "always stay on the same page".
Do you have a template compatible with bootstrap ?
You can try to remove the "use bootstrap design" in the HikaShop configuration (tab "display", first section).
Otherwise I think the best will be to tweak the CSS in order to improve the compatibility between your template and HikaShop.
We have a tutorial documentation which explain the basics :
www.hikashop.com/support/support/documen...ize-the-display.html
With a link to your website, we could give you more details (in the limit of our skills, we are developer but not designers).
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.