not rendering html correctly

i have a shortcode [sc name=”book_now” url=”/contact”]

with:
<a href="%%url%%" target="_blank"><div class="cust-read-more-testimonials booknownm-button hvr-glow-dark"></div></a></div>

but it renders like this:

<p style="text-align: left;"><!-- Start shortcoder --><a href="/contact" target="_blank"></a></p>
<!-- Start shortcoder -->
<div class="cust-read-more-testimonials booknownm-button hvr-glow-dark"></div>
<!-- End shortcoder v4.1.7-->

basically i am just trying to have the a tag wrap the button div why is it not working?

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