The Page plugin lets you easily embed and promote any public Facebook Page on your website. Just like on Facebook, your visitors can like and share the Page without leaving your site. You can use the Page plugin for any Page that is not restricted, for example, by country or age.

I suggest you to use the Facebook page plugin.

it is easy to understand and easy to use.

Facebook page plugin

or you can use my code and only replace your Facebook page link instead of me.

<div class="onlycontent"> 
<h1>VNorm Official Facebook Page</h1> 
<div class="fb-page" data-href="https://www.facebook.com/vnormcambodia" data-tabs="" data-width="500" data-height="" data-small-header="false" data-adapt-container-width="true" data-hide-cover="false" data-show-facepile="true"> 
<blockquote cite="https://www.facebook.com/vnormcambodia" class="fb-xfbml-parse-ignore"> 
<a href="https://www.facebook.com/vnormcambodia">VNorm Official Facebook Page
</a> 
</blockquote> 
</div> 
</div>

how to add css responsive on an facebook profile page. Please check this URL: https://www.v-norm.com/css-responsive-width-facebook-page-plugin