ProNutro (PEPSICO South Africa)

I reported a product (ProNutro) almost a month ago. The food had a toxic plastic-type smell and taste to it. I have eaten this brand and flavour all my life, so I know that it is off. The expiry date is still within it's limits, so it is something else. I could just have returned it to the shop I bought it from and gotten a refund, but thought that they would appreciate the feedback. All info about the product (brand, size, flavor, batch info, photos & till ship) was confirmed. They said someone would contact me, & that I must please keep it for collection. Last week someone emailed me to ask for the info & photos again, after everything was already sent. I resubmitted, but no reply. Next week it will be 1 full month and nothing happened. Now it's probably too late to take it back to the shop where I bought it. I expected more.