Custom form redirecting out of the pop up

Hello, I am using a custom htm form, because the integration with mailchimp does not allow me to put more fields apart form Name and Email (I need mobile)

So I used the following custom form.

<div id=”ppsPopupShell_[ID]” class=”ppsPopupShell ppsPopupListsShell”>

<div class=”ppsInnerTblContent”>
<div class=”ppsPopupListsInner ppsPopupInner”>
<div class=”mail-img”></div>

<div style=”clear: both;”></div>

<div class=”ppsRightCol”>
[if enb_label]
<div class=”ppsPopupLabel ppsPopupListsLabel”>[label]</div>

[endif]
[if enb_txt_0]
<div class=”ppsPopupTxt ppsPopupClassyTxt ppsPopupClassyTxt_0 ppsPopupTxt_0″>
[txt_0]
</div>
[endif]
<div style=”clear: both;”></div>
[if enb_subscribe]
<div class=”ppsSubscribeShell”>

` <form action=”//gts-modaitalia.us9.list-manage.com/subscribe/post?u=xxxxxxxxxxxxxxxxxxx” method=”post” id=”mc-embedded-subscribe-form” name=”mc-embedded-subscribe-form” class=”validate” target=”_parent” novalidate>
<div id=”mc_embed_signup_scroll”>

<input type=”text” value=”” name=”FNAME” class=”required” id=”mce-FNAME” placeholder=”Όνομα”>
<input type=”text” value=”” name=”LNAME” class=”required” id=”mce-LNAME” placeholder=”Επώνυμο”>
<input type=”email” value=”” name=”EMAIL” class=”required email” id=”mce-EMAIL” placeholder=”E-Mail”>
<input type=”text” value=”” name=”PHONE” class=”” id=”mce-PHONE” placeholder=”Κινητό”>

<div id=”mce-responses” class=”clear”>
<div class=”response” id=”mce-error-response” style=”display:none”></div>
<div class=”response” id=”mce-success-response” style=”display:none”></div>
</div> <!– real people should not fill this in and expect good things – do not remove this or risk form bot signups–>
<div style=”position: absolute; left: -5000px;”><input type=”text” name=”xxxxxxxxxxxxxxxxx” tabindex=”-1″ value=””></div>
<div class=”clear”><input type=”submit” value=”Εγγραφή” name=”subscribe” id=”mc-embedded-subscribe” class=”button”></div>
</div>
</form>

<div style=”clear: both;”></div>
</div>
[endif]
[if enb_sm]
<div class=”ppsSm”>
[sm_html]
</div>
[endif]
[if enb_foot_note]
<div class=”ppsFootNote”>
[foot_note]
</div>
[endif]
<div>
</div>
</div>
</div>`

The problem is that it is redirecting outside of the form taking the user to another page, while it should redirect inside the popup.

Is this possible?

https://wordpress.org/plugins/popup-by-supsystic/