Great Value - Part found in Bag

We purchased a bag of Great Value Salt & Vinegar Potato Chips Flavored at a Walmart Grocery Store. Upon opening first time ate some.

Few days later opened bag and there was something black in bag. Plastic black pieces - two pieces.

Back of one stated Innovations. The bag said on the upper right hand Best if used by April 1, 2019 04336334 - 17:49.

What should we do with what we found?

Please advise.

Great Value Salt And Vinegar Chips
Reason of review
Bad quality
Preferred solution
Quality Control.
Review #1491079 is a subjective opinion of poster.