If you have asked more than once and she persists in ignoring your requests it's time to find a different demo.
When I moved a few years ago, I started with a hobby demo. I didn't know there were such things before then, but then I hadn't heard of SCS either, lol! She was very helpful with some questions I had and I placed one small and one quite large order with her. Eventually I asked if she knew of anyone who was doing stamp camps and she connected me with someone. I eventually told her I didn't need two demos and so would be placing future orders with the stamp camp gal. She said she appreciated my telling her because usually people just "drift away." Of course she wasn't my best friend.
Good luck with your decision.
Most people would rather die than think. Most people do... Bertrand Russell