I did not receive this item. I received a different item

I was so happy to see that my package had came until I opened it and you guys didn't send me the top to the pants. I was told to pay for shipping to send it back to you guys although it wasn't MY mistake. Although I was told I would be reimbursed my shipping money but you guys wanted me to send then pants back when I WANT the pants I just needed you guys to send me the TOP that you guys didn't LET ME KNOW I wouldn't be recieveing. I didn't get an email or anything saying the piece would be missing. I'm very unsatisfied because all I wanted was for you guys to send the top to match it or give me store credit! Anything else IS EXTRA && too much when it wasn't my fault and you guys didn't send me an email saying I wouldn't get the top! You guys ruined my outfit for a very important event! SO THANK YOU!