Hi,
I went at Rogers last Friday and I asked for 1 GB data plan. I got told, after the rep phone his tech, that it wouldn't work since I had a voice plan. In other words, this option could not be matched with a voice plan and the best he could do was to give me a 500MB plan...
Sounds like you did this in store. I (and a number of friends) just called up Rogers and asked them to do it. No problem at all. The quote from the phone rep was "Just tell me what plan you want, and I will give it to you"
-Brian