Hung up on me three times!

CCD scheduled a delivery time of one hour in the day. Within that hour I received an sms to say that the delivery was delayed and an agent will call me soonest. After another hour had passed I called to say that I have to leave the office and wanted to know whether the courier was close. If close I would wait or alternatively we could reschedule. I got as far as speaking to the person who liaises directly with the courier. He put the phone down on me! I tried three times. Every time he would cut the call. Very unprofessional. Why not answer the simple question? Why cut the call? Got my card. However, it was an unnecessarily bad experience.