Incorrect package

I placed my order on Monday which was a baby feeding chair and today got delivery of a wrong order as soon as I saw it's wrong I requested for the order to be return and get a correct order.I then sent an email to advice them that I need the order by Friday as I'm attending someone's babyshower on Saturday and need that present. The person assisting me tells me will get the order next week.but how when this was they fault. I need my order before Saturday.