Apple Watch Beta OS Downgrade

I have an Apple Watch Sport 42MM Space Gray. I put WatchOS 2 beta on it, knowing it was a beta. I knew there were gonna be problems, but I wanted to test out my app’s. Soon after downloading it, my watch would re-boot. And re-boot. It did it for hours. So i unpaired it, and then it wouldn’t pair with my phone. It kept saying “Error with server”. iOS 9 beta has been fine on my 6 Plus. So i have a repair ,and I shipped my watch out to Apple. I saw were some people were getting charged. It was free for me! Anyone else did this? I had to test my apps somehow.