They changed the ingredients without saying it

I've bought this product several times before. It's great. Until I bought my most recent box. I noticed the opening was triangle instead of an oval and the box had extra text on the side, but other than that, it looks identical to the box I bought in the past. I prepared my tea and as soon as I tasted it, it tasted off, it tasted different. I went to get my old box to compare the ingredients. Apparently they added cinnamon. Now I don't like the taste. Nothing on the box says they changed the ingredients. This is wrong. I feel like I wasted my money and I lost one of my favorite tea flavors. It should have been advertised on the box that they added cinnamon.