Ozgrade & Flat Chat. Sorry, but getting support of Airservice's customers - Airlines - and their customers - pax - is surely not an objective of ATCs. Getting their attention is the objective. Given there is so much notice:
a) Airservices can go back to the negotiations with Civil Air with good intent
b) Airlines and other operators can make strong suggestions to Airservices to resume negotations to avoid disruption to their schedule
c) Airlines, other operators, and the travelling public can try to make alternate arrangements if required.