Facebook Ads Tracking and Audit Expert

Meta Pixel / Conversion API Expert Needed – Facebook Ads Tracking Audit

I need an experienced Meta Pixel / Conversion API specialist to audit and fix Facebook ads tracking for a live events / ticketing business.

Current issue:
Meta Ads Manager is significantly underreporting purchases compared to actual ticket sales.

Example:
£174 ad spend showing only approx £160 tracked revenue in Meta, while actual ticket sales during the same period are approx £610+.

Setup includes:

Meta / Facebook ads
Custom landing pages
Ticket Tailor checkout
Embedded / modal checkout flow
Possible custom domains

I need somebody to:

Audit Meta Pixel setup
Audit Purchase event tracking
Check domain verification
Check Aggregated Event Measurement setup
Audit Conversion API (CAPI)
Test the customer purchase journey end-to-end
Diagnose attribution leakage issues
Ensure events are firing correctly
Improve Meta purchase attribution accuracy

IMPORTANT:
This is NOT about improving ad creative or campaign strategy.
This is specifically a tracking / attribution audit and fix.

Please only apply if you have specific experience with:

Meta Pixel
Conversion API
GTM
Ecommerce or ticketing attribution troubleshooting

When applying, please briefly explain:

What you think the likely issue is
Similar tracking problems you’ve fixed before
What access you would need
How you would test the purchase flow