I have a collection of a custom object 'payments' that stores all the payments with a certain status. 
Then these payments are displayed in a datatable and users can select multiple payments. 
As a result I now have another collection with the selected record Ids. 
How can I get a third collection of only payments with Ids that do not appear in the selected collection without using multiple loops- I keep on hitting limits.
I tried creating an apex class but it seems like invocable methods cannot get and return lists.