Wsetjet Travel Bank Credit Issue - Not Happy

I had more than 1000 dollars credits expired just lately. I naively thought Westjet would send a remind email, like many other airlines do with their loyal points, to the customer about the expiry date, because this is real money - much worthy then pionts! Their website design only give your the total amounts, not the expiry date, You have to change the date range and go into stattements to find out the expiry dates by yoursel.  I suspect this is intensional or just a bad design. I called their Super support a couple times, either cut of, or they say they can do nothing about it. I asked to talk to a supervisor, they say they are the highest I can reach.