Failing online delivery

I placed an order the 11th of April and still haven't received anything yet. I checked with On the Dot tracking and it shows the items were scanned and handed to the courier for delivery on the 15th of April and it shows shipped since that day. When i placed the order it showed it would be delivered in 1 - 3 days. Which should have been before Easter Friday. I went to the shop yesterday and the manager made a call to check where the items were and i was given some **** story about it being delayed because it was Easter blah blah blah. The point is that I was supposed to receive it before Easter!! This is my first time shopping online with MRP and it's terrible thus far. I expect to be compensated for the full amount of my order, nothing less. You've already missed your own, extended, estimated delivery date.