Message sends, but no confirmation appears

Hi, firstly thanks for a great looking contact form plugin.

I have got a form and it now no longer shows the confirmation that the message was sent. The arrows spin, and then the form is cleared.

If it helps, this is the page: https://www.tangcla.com/contact-me/

Here are the contents of the WordPress page:
<div class=”row”>
<div class=”col-lg-6″><span class=”orange” style=”margin-right: 5px;”>Telephone:</span> 0439 339 339
<span class=”orange” style=”margin-right: 5px;”>E-mail:</span> [email protected]</div>
</div>
[contact-form-7 id=”3087″ title=”Contact form 1″]

And this is the form:

<div class=’col-lg-6′>
<div class=”form-group”>
[text* your-name class:form-control placeholder “Name” ]
</div>
<div class=”form-group”>
[email* your-email class:form-control placeholder “Email” ]
</div>
<div class=”form-group”>
[text your-phone class:form-control placeholder "Phone" ]
</div>
<div class=”form-group”>
[text your-subject class:form-control placeholder "Subject" ]
</div>
<div class=”form-group”>
[textarea your-message class:form-control placeholder “Message”]
</div>

[submit “Send” class:SubmitButton]
</div>
</div>