no delivery

I ordered 3 items. On 15 December I get a call from our reception a package has arrived. I were so happy as it has been delivered early. Only to find out only 2 of the 3 items were delivered. I did not even get to see the delivery guy as he just left without waiting for me.I phoned call centre and were told they will get back to me. Thereafter I received 2 emails ans sms stating that all 3 my items were delivered. I phoned call centre again 16 december to say the emails were incorrect. I were told my last item will b delivered 17 december. It still has not been delivered. I phoned call centre again and were promised a call back. Well I have not received a call back. It is my son's Xmas present. Why can't I get help. Poor poor service<br>