Disappointing Service

It is the second time I pay for overnight delivery and not get my items overnight!! The first time I paid for overnight delivery and only received the item after 2 days, which defeats the purpose of paying more to get items delivered quicker. This has happened again where I paid for overnight delivery as I am going out of town tonight and was supposed to receive my stuff yesterday, I got the notification that my parcel is out for delivery and would be delivered before 5pm but at 20 min past 4 I got an email saying delivery failed, with no explanation aa to why. I called their cpt call center and the first.person I spoke to placed me on hold and then dropped the call, I then had to call again and the second person couldn't give me a reason why my delivery is delayed but promised i will.get my parcel delivered today. I am currently waiting to see, really disappointed and highly inconvenienced by this.