I bet the phone line is a lot less busy today. Assuming some cities add dates, an additional Propaganda pre-sales is possible. Besides, there are future tours to think about.
If you were a Prop member, I would not give up, I had to call numerous times, I barely got my status fixed.
Unless they say, "our fan club specialist checked the Prior Propaganda list and nobody with your prior address or name is on the list", I would keep trying.
If they do say the above, it is not FanFire's fault, they only have the list that was given to them. It is a problem that lies on Propaganda's end. I have no idea how to resolve a problem on that level, but I imagine somebody is in that boat and will eventually find out.
I would say that any past ticket presale documentation/letters, Propaganda magazines are the key evidence that you will need to build your case.