Shopify Meta Pixel Problem

Hi,
I need urgent help with my Meta (Facebook & Instagram) + Shopify setup, because it has become a complete mess and I’m stuck.
I’ll explain it clearly:
I have 2 Meta Business Portfolios:
Geert Gevaar
Geert Gevaar 1
I no longer have full access to Geert Gevaar 1
(only limited access via my Instagram account @geertgevaar)
I have 2 Facebook Pages with the same name (Geert Gevaar):
One page I don’t seem to have access to anymore
One page I do have access to (profile picture with a Christmas hat)
My website runs on Shopify
Pixels, ad accounts, pages and business managers are clearly mixed up
Current problems:
Meta Pixel / Conversions API is not tracking correctly
Events like ViewContent, AddToCart and Purchase are unreliable or not firing
Ads cannot be launched safely because data is wrong
I’m afraid of wasting ad budget
What I need:
Clean up and structure my Meta Business setup
Make sure ONE correct Business Manager is used
Connect ONE correct Facebook Page
Connect ONE correct Instagram account
Properly connect Shopify + Meta Pixel + Conversions API
Verify that all events are firing correctly
This needs to be fixed ASAP so I can finally start running ads.
If you have proven experience with Meta Business Manager + Shopify + Pixel/CAPI, please reach out.
Thanks,
Yev