breaches the order on whole or in part or fails to use diligence in the performance thereof company may at its election and without prejudice to any other remedies available to it take over and perform or obtains another contractor to take over and perform all or any part of service then remaining unper formed if company takes over completion of services , or obtains another contractor to do so , company 's sole obligations shall be to pay contractor upon completion of services and subject to the other provisions of the reduce or suspend payment: