First thing - that page is weird - the map took ages to load and even after that the progress wheel continues to spin (in Safari)
There is also a JS error from your widget
TypeError: ‘undefined’ is not a function (evaluating ‘w.decay()’)
Do you have to use formmail - it is notoriously easy to hack?
In your form fields you have given these fields a value of name, email, telephone etc but all that means is that clicking the submit button just sends through those values without your visitor having to type anything.
Instead use Item>Extended on the field and in the Input section create a new name value pair of placeholder/whatever text you want to show. Example at http://www.deltadesign.co/formtest.html
I had both the API v2 and v3 running, so I turned off v3 on the google panel and all seems good now.
The only errors I am getting are web font related, but they are in the place that the errors say they can’t find them, so I’ll have to investigate that further.