Wrong message if their credit card is declinded

-- url of the page with the problem -- : www.m2820.com
-- HikaShop version -- : 4.0.1
-- Joomla version -- : 3.6.5
-- PHP version -- : 5.4.45
-- Browser(s) name and version -- : Chrome

When my customer's credit card is declined or they enter the information in incorrectly, Hikashop does not indicate this, but instead, gives a message that looks like the website is at fault. I've attached the message Hikashop gives. How can I change this to a message that says, "Your credit card was declined or the information was inputted incorrectly? Please try again or use a different credit card."

If a different credit card is used, everything works correctly.