Non-delivery of same package twice

They have not delivered my package from Makro twice now after phoning me in the morning to confirm that they will deliver by 18:00 on the day. First time was Thurs 7 Aug, and again today. I have placed the order 8 days ago and was supposed to be delivered within 2-3 days. The fact they have done this twice, with 4 days in between each, is unacceptable and very poor service!!!!