Amazon.com

I have bought literally every penny on purchases on Amazon. I would say at a minimum 75 out of every 100 is on Amazon.com.  Now they have the subscribe and save program and I have found it does have higher prices most of the time when it comes to food and basic needs to the prices around me but I keep a watch for deals. I saw a deal on Kellogg pop tarts a case of frosted raspberry so that is 8 in a box and 12 boxes For 30.00, so I thought it was good deal. Then before the box even arrived and I am a two day prime
member, the price changed to 23.00.
Now I always believed if u bought from a store and what you bought went on sale within 30 days that they would re. imburse you. I know food probably doesn’t fall in that and I know in the consumers rights it does say perishable goods are excluded, but, its amazon. It was from them not an affiliate and they have the best customer service anywhere. Now yes, it is only around 7.00 but it still is 7.00. I am still just dumbfounded that they said there was nothing they could do.
It is Amazon.com. I am just dissatisfied and disappointed in them. Now,, am I wrong?