No response to complaint, No Show by Courier

I made an order on Ebucks online shop. I received a call from an Ebucks courier to arrange delivery of my purchase. I took leave so I could be at home for the delivery but the courier did not bother to show. I wrote to Ebucks using their online form complaining about the fact that they did not keep to there arrangement or even notify me they would not be able to deliver as arranged. Ebucks did not even bother to replay to my complaint. They did not even make an effort to acknowledge the complaint I submitted.