Save-A-Lot

I purchased 2 containers of this cereal for my son. I didn't think to check an expiration date when it's supposed to be fresh! The product expired on the 30th I purchased it on the 4th of November! My son has had some stool issues because of it! I called the store all I was offered was a refund! I will be contacting my Lawyer this is absurd!
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Here's my number please have someone contact me!