NOT DELIVERING NEXT DAY!!!!!!!!!!!!!!!

Every month i pay for overnight courier fees and every month i only get my parcel 2-3 days later. Then WHY give this option to customers???? Today i communicated with them to inform them i will only be at work until 13h00, it is now 12h52 and my parcel is still not here!!!!!!!!!!!!! UNACCEPTABLE !!!!!!!!!!!!!!!!!!!!!!!!!