Not even an apology with foreign object in found in the food product

I found a white stone in a packet of sweets which I bought which got lodged in my teeth. The I sent an email on 10 June 2021 and until today, I never received a response to the email but then I phoned them. I was advised I would get a response soon. I just got ignored and did not even get an apology. I sent photos with my email but it was just ignored. For such a big company, I am utterly shocked at the pathetic customer service!