Courier delivery not fulfilled

I received a message from Courier IT this morning stating that I would be receiving my package at my home. As soon as I got the message, I called Courier IT at approximately 9:00 a.m. to request that they consider delivery at around 15:30 because I would be at work. I was placed on hold to speak to Tracking parcel department for more than 20 minutes as no one answered attended to that transfre call. When one of the receptionists finally asked for my number, no one ever phoned me back. Since I can receive packages from other carriers using the same address, I'm curious as to why they are reporting an address problem when I've tracked my package now. Parcel number: G***