Save Mart

I've been trying to contact Save Mart for their coupon policy because they wouldn't let me stack coupon at their store. I emailed them first and they didn't send me their coupon policy so I emailed them back. I got a message today telling me that they don't give out their coupon policy to customers! And they consider stacking coupons doubling coupons and you can't do that. My situation was that I had a catalina coupon and a manufacturer coupon for Danactive yogurt and the computer system would not accept both coupons.
Too bad! I guess I'll have to be careful with my coupons there. I need to make sure that I can't get a better deal by stacking somewhere else.