Warranty replacement question

I how did defective camera called in the order a replacement I was supposed to get an email with return instructions for my damage product and never received it. It took over three weeks to get the camera I received no tracking number or anything. I just happen to look outside this morning on my front door and there is a package opened it and my replacement camera was there thank goodness someone stole it because I don’t use my front door regularly, but I just got an email saying I need to return my old product but I don’t have any instructions for it because I never received the email. What exactly do I need to send back for a stick up cam third GEN? Do I put the battery in with it or not ship the battery? That’s my question.