WORST! These guys know nothing about deliveries!

I bought an item online and the place I bought from used the courier guys as a delivery method. I was meant to receive the order within 4 business days and it has been over 7 days and the item is still in transit?? I have never before waited this long for a delivery. In fact I can't remember the last time a delivery took more than 2 days, I am actually shocked they have found a way to delay and complicate something other companies do so easily. We have things like 60/60 delivery, same day delivery and overnight delivery, so why the hell is it taking over a week to deliver a package??