I called and did this on Saturday for 2 Samsung UN32F5500 TVs. I called the regular number and just kept saying activate until it finally asked if I wanted to to it using the computer or talk to someone. I told it talk to someone and they transferred me to a CSR. I explained to the CSR that I needed to add two additional RVU clients to the account for RVU TVs that I self installed (the rest of the system was installed earlier that day by a tech but I wasn't willing to pay DirecTV $50 for each RVU TV that I could hook up myself for much less).
The CSR had never activated one for a customer self install, so he did have to put me on hold a couple times, and he did ask for the TVs make, model and serial number for the first one. Then however once he figured out how to do it he realized that he didn't really need that information and he was able to add the second TV without it. Overall I was only on the phone for about 30 minutes. Sorry you are having so much trouble, but my only suggestion is to just call in and try again and hopefully you will get someone who knows how to do it, or at least is willing to ask others around them for help.
The CSR did tell me that it was difficult for him to find the information on how to do it. I guess all the information that is easy to find is all about tech installed/activated RVU clients and the process is different.
Sometimes when I reflect back on all the beer I drink I feel ashamed. Then I look into the glass and think about the workers in the brewery and all of their hopes and dreams. If I didn’t drink this beer, they might be out of work and their dreams would be shattered. Then I say to myself, "It is better that I drink this beer and let their dreams come true than be selfish and worry about my liver."
-by Jack Handy