Delivered wrong parcel

I received a parcel that is NOT MINE! The details on the outside of the package are mine on the one side, and on the other side there are details of someone else! What's inside the package is NOT MINE AND NOT WHAT I ORDERED. I need the correct parcel ASAP! I need the 2 piece to wear to a wedding next week! I am so angry and disappointed.. this is very ***********! Disgusting to say the least. What am I expected to do with dog leashes that you sent??? I don't have a dog! I want my parcel ASAP.