Pepsico Simba Cheetos - Terrible Experience

Appalling service received from Pepsico, the company responsible for Simba Cheetos. I have lodges a formal complaint with the customer careline about small stones found in the simba Cheetos Chips, to which I had supp**** all the relevant information that was requested from me as well as kept aside the package with the sample chip for collection and inspection. It's now almost 2 months later and after persistent emails for a response from Pepsico, their final response was that they claim to have conducted an internal investigation and found nothing wrong. The sample and the packaging still remains with me as Noone had come through to collect it. The customer service representative gave very poor communication and reasoning and nothing of what they say appears to make any sense. I have records of all our correspondence as well as the sample still in my possession. It is very disturbing that a company as big as Simba would take such matters so lightly and give complete disregard for customer complaint and satisfaction, not to mention the health hazard it poses. They also claimed to have sent a complimentary voucher yet no such voucher came. I appeal to others who have experienced similar to not let this be as such issues needs to be brought to the attention of the public especially when such big cooperations can easily dismiss of such issues without any repercussions. Disappointing to say the least