return old cable boxes

I have been trying for 4 hours to get a straight answer and also just read the previous post.  So please allow me to understand.  I am supposed to take the boxes to UPS and just let them handle it?   I am getting charged for renting this equipment and would like that not to be the case so once the equipment is received you guys will know which account to remove it from?  I only ask because when I go to initiate a return on you site it tells me to "select a device" and then gives me zero options for devices to return, so doesn't make me feel like this process is running smoothly.  Please can you just email me and tell me how exactly this works?

Thank you,

Wes