Support Not Responding

Hello, I was wondering if there is an event or something going on? I sent a message to support last week and haven't heard anything even though I got an email that said that they would reply within 3 business days and I even send follow up messages and got nothing. I received an incorrect book in my order and had a question about the return shipping since it seems like I would have pay for it to go back and get the correct book. Im just looking for a solution and someone to respond to my query.