Want to return two cameras

I received 2 cameras in a deal, but the function of those cameras is not what the rep said they would be. It was a good deal if they worked, that is. Anyway, I don't want them and want to return them, but the Xfinity store won't take cameras, only TV boxes. I went to UPS, and they won't take them without a label from Xfinity. But, when I go to xfinity.com/returns, they are not even listed nor are they listed on my account. So, now what?