Facebook PIxel and Mailerlite landing page errors -- can someone help?

[RolandP]

Is there anyone who is very good at figuring out and correcting setup errors involving a Facebook Pixel (The Ads Pixel for Shopify Facebook Ads) and MailerLite landing pages and Thank You landing pages? I am frustrated because Facebook Advertising support is poor, and MailerLite Support personnel cannot help with the things that are related to Facebook. I'm looking for someone skilled and trustworthy. Anyone like that in this community?

Thank you. 

Troubleshooting

[RolandP]

I have also contacted formal Shopify Support, and worked with someone there, and he concluded that only Facebook Support can resolve the problems. But Facebook/Meta advertising support is not responsive.