Hi,
First, check the menu Customers>Emails history of HikaShop.
There, you'll find all the emails sent by HikaShop. You should normally find the contact email there.
If you don't, it means that something stopped the process before or while HikaShop was generating the email to be sent.
In fact, checking your website, I can see that there is something redirecting the user to the catalogue page. There is no such mechanism in HikaShop to redirect there when the contact form is submitted. So that would indicate that something is redirecting the customer before or while the email is being generated.
For example, that would be the case if you had customized the contact email in the System>Emails menu to redirect to the catalogue form while the email is being generated. Another example would be a plugin doing the redirection based on the events onBeforeSendContactRequestEmail or onBeforeSendContactRequest which are triggered by HikaShop before the contact email is being sent.
Or it could just be that you have a bug on the contact form that we already fixed in a later version.
However, I checked the changelog on our end and I don't see anything since the 4.4.5 regarding a problem like the one you're having:
www.hikashop.com/support/documentation/5...ashop-changelog.html