Problem contact form

Hello,

I am very happy with this theme! I just put online the website: alpine-lodges.fr
I test my contact form but no message announces that the email was sent, more information (email, name, message) remains registered ….

How can I have a window or a message announcing that the email has been sent?
the <p noticefailed> </ p> leaves the visible text even if no message was sent …

Thank you for your help