ticket refund

Got an email from the Saints that they would credit me the refund for the preseason game and the packers game towards next years tix or towards a suite. I emailed them and said I want a refund, not going to give them an interest free loan. They made me fill out a form and are processing the refund. However, in calculating the refund they significantly devalued the preseason game. In the past, they have charged as much for preseason games as regular season games. Just seems convenient that now when they are giving refunds, the preseason game is not as valuable. I looked back at my invoice and it doesn't say how much the charge was for each game. And of course we don't get paper tickets anymore so I wouldn't even know what face value would be considered. Anyone have any insight?