If the form doesn't send the attached file, please check the form's settings as shown on the screenshots below:
Here's the demo code:
<div class="vamtam-rsvp-form">
<div class="row">
<div class="row">
<div class="grid-1-3">
[text* name id:name placeholder "Name"]
</div>
<div class="grid-1-3">
[text* Phone id:Phone placeholder "Phone"]
</div>
<div class="grid-1-3">
[select dropdown id:events-dropdown class:wpv-chosen-select "Audi" "BMW" "Volvo" "Mercedes" ]
</div>
</div>
<div class="row">
<div class="grid-1-1">
[textarea* our-message x5 id:message placeholder "Case Description..."]
<label> Attach photo/video </label>
[file uploadfile limit:5000000]
</div>
</div>
<div class="row">
<div class="grid-1-1">
[submit "Send →"]
</div>
</div>
</div>
</div>