Amalgamate my company Meta accounts into one management space

Our CRM/Marketing software requires that IG accounts connect via Facebook account (which only one of the accounts uses). 4 IG accounts are individual. 2 accounts are linked to the Facebook of the CEO.
I need this resolved asap, in order to get connected up to the Go High Level software.

I need you to be very experienced in these account issues in Meta and how to resolve them. Examples of previous roles/tasks like this will be helpful to choosing the right person.

I need this done today if possible.