Singapore Airlines  -  choosing bad partner airlines

Hi, we are more then 400 group of indian people in auckland new zealand regularly travelling to ahemadabad, gujarat, india using singapoure airlines . Now you tie up with most recist airline staff with air new zealand. It is humble request to stop sharing plane with air new zealand for auckalnd to /from singapoure as we book to singapoure airlines not air new zealand.
We are very disapppointed with service of air new zealand and will stop to use singapoure airline if they continue wih air new zealand this as we paymore and get zero service from air new zealand.