No idea when to expect a delivery

I got an SMS this morning 8:00 to expect a delivery and at 13:30, a Courier IT van just drove by but did not stop. There seems no way to communicate with your company and the website's updates aren't helpful - for days it simply stated "Client Doesnt have a parcel for Collection" even though the parcel had been collected from the retailer. How do I know when they will deliver, how do I request a time?