Worst delivery booking system

Very unhappy. Whether you do in-store purchases or online purchase and request delivery you don't receive it on the pre-booked date either by manual booking in-store or online date selection. There is always a story of no trucks available they don't call you to inform you that there is an unforseen event you have to call and listen to the excuses. They are cheaper than most stores but to have workers come in for the day and wait for material to arrive that doesn't show, doesn't make it worth the cheaper price plus the rates of workers to have stuff delivered when they feel like it. Then I will rather go to another supplier pay a bit more and but atleast I will have my stuff on time. I am not being pittt about a once off event. This is so far each and every order I requested to be delivered that doesn't get delivered on the date booked.