Button onclick event problem (including tracking codes and pixels)

hey folks,
today i need a little bit of help. We made a short and clean landingpage (see private content) for a customer and he wants to track downloads from that page with a google conversion and tracking codes from the online marketers. But we can’t get the onclick event running.

1. onclick event
So this is what we have:
This google analytics tracking code at the right place in theme options

<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-xxxxxxxx-x"></script>
<script>
  window.dataLayer = window.dataLayer || [];
  function gtag(){dataLayer.push(arguments);}
  gtag('js', new Date());

 gtag('config', 'UA-xxxxxxxx-x', { 'anonymize_ip': true });
</script>

Then we have a Button on the landingpage – and following your instructions – with the class: vip
And i searched the forum and found this script and placed it at the end of the functions.php from the child-theme:

function ava_custom_script() {
?>
	<script type="text/javascript">
	(function($) {
		// vip button onclick attribute
		$('.vip a').attr('onclick', 'gtag(\'event\', \'click\', {\'event_category\' : \'download\', \'event_label\' : \'vip\', \'non_interaction\': true})');

	})(jQuery);
	</script>
<?php
}
add_action('wp_footer', 'ava_custom_script');

We also made the conversion target in analytics with category:download, action:click, label:vip, value:1
but google counts no event!?

2. integrating the other script in the onclick event
In the first step i placed the other codes from the marketers in a code block on the landing page with success, but now they want to have the other codes also with the onclick event – is it possible to combine this in the script?

Here is the code from the code block element to integrate in onclick event

<script async="true">
            (function(id) {
                var i = new Image();
               i.src = '//k.intellitxt.com/log/pxl/' + id + '/' + encodeURIComponent(window.top.location.href)+ '?' + (+new Date);
            })(575);
        </script>

 <div style="display:inline;">
<img src="https://farm-de.plista.com/activity2;domainid:1027692;campaignid:1058582;event:31"style="width:1px;height:1px;" alt="" />
<img src="https://farm-de.plista.com/activity2;domainid:1027692;campaignid:1058580;event:31"style="width:1px;height:1px;" alt="" />
<img src=" https://tracking.lqm.io/conversion_event/campaign/67556/t.gif?conversion_id=1&value=[0.0]" width="1" height="1" />
<img src=" https://tracking.lqm.io/conversion_event/campaign/67562/t.gif?conversion_id=1&value=[0.0]" width="1" height="1" />
</div>

So have i picked the right script for this?
Any help is much appreciated.

Thanks
heavy