Wrong Item Delivered - a week later, no response or willingness to ensure I get the correct garment

I ordered a blouse online because there store had no stock although their system said they had one in stock? After waiting a week, the item arrived, addressed to me but with the wrong garment inside. I phoned and reported this immediately whereby I was asked to email *** with the photos and description of the incorrect garment. I did so immediately. Another week went by, I phoned again and this time a lady told me that not only has no arrangements been made to collect the incorrect garment, but nor has anything been done to ensure I get the garment I ordered. All she kept on saying was that someone will contact me to arrange to collect the wrongly delivered garment. WHAT ABOUT THE BLOUSE I ORDERED???? Will I get it before Christmas??