Contact Form not working

Good Day

I have installed the Pressa theme in the latest version of WordPress and was wondering if anyone could help me to get the contact form to work as at the moment the email does not get sent form the website.

You can view it here:
http://www.dps-securityawareness.ae/contact-us/

I have also entered a valid email address in the field at the bottom for :'Email for messages".

Many thanks
Sonya