How to use COUNTIF with a NOT IN operator

How to use COUNTIF with a NOT IN operator

countif("Tickets"."Status"!= 'Completed' or"Tickets"."Status"!='Closed'  OR"Tickets"."Status"!='Service Call Completed'')


countif(NOT("Tickets"."Status Group" IN ('Completed','Closed','Service Call Completed') 
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I have tried this in multiple ways including adding parenthesis in each OR statement