"Customer Service" must be an empty office! Two months after a complaint, no response from CS

I have had the most appalling service EVER at KFC. I sent an email to customer service on the 8th of October concerning their "veggie" burger, which had just potato in, not corn or beans or any other veggie, as described. After receiving NO response for a month, I posted on the KFC Facebook page. After waiting far too long for any response, I received a reply on my Facebook post asking for my contact details. I sent my details and awaited a response. After waiting for weeks, I sent a message asking for a response, was given a reference number to which I explained that I already have a reference number from my October 8th email which I still hadn't received any response from. It is now over a week since my new reference number was given AND STILL NOT A SINGLE WORD FROM CUSTOMER SERVICE. Nearly two months since my complaint and not ONE response from Customer Service! This is absolutely DISGUSTING. I have never come across a company with such incredibly downright awful, actually non-existent "Customer Service" in my life