foreign object in my chocolate

good day

love to know how cadbury makes their chocolate without checking for any foreign objects first.

a few weeks ago i purchased a slab of chocolate and almost swallowed the plastic that was found in it.

i would like to know how the hell you pack your products without checking them first.

i have pictures of the chocolate and can not believe the chocolate i and my family once loved can be so careless.

i would like feedback in this regard ASAP.