I had to pay for the return shipping. It was only about $1.80. I was told to not send anything but the defective lights, no straps or accessories. And they sent back only lights.
I kind of expected them to send a mailer. Instead, one email said they would send me two Q5 models. I figured I was being upgraded for my trouble, so not getting a mailer was okay. Then the next email said two P4's had been sent. So, at this point I'm not sure which model I have. There was no packaging with the replacement light. But they work great, and I'm happy.
I hope they get you straightened out soon.
Geoff