Instruct: Classify Amazon reviews into positive or negative sentiment
Query: NO CALL BACK! HORRIBLE SERVICE!

I ordered this and they sent me the wrong poster. Since, I have sent in my return only wanting an exchange and have heard nothing back in return. I have also called their return line and left my name and phone number and NO ONE has called me back regarding my return. The phone message states that it will take no longer than one day to return the phone message.I am very disappointed and have not yet seen my money credited back to my account, nor have I recieved the correct poster that I originally ordered.Any form of contact would be appreciated.