Burger King doesn't accept customer feedback

I went on the internet and saw the special they have. I registered, got a code by email and wanted to redeem a voucher. The site warned me the code will only be valid for 15min, so redeem at the restaurant. I felt like a bicycle ride, so I hopped on my bicycle, making sure I took my phone with. At the Olympus branch (Pretoria), I went on the internet again and told the staff I would take the ‘Big King medium meal” for R41. I logged in with my email address, tried to redeem a voucher again. The code is then send again to my email address. Unfortunately, I purposely do not enable emails on my phone as I feel that’s mostly business which I do from my home office !!!! I tried to explain this to the manager, but she was quite abrupt in saying “without a code, I can’t do anything”. I’ve been going to that branch since they opened (4, 5 years ago) on a very regular basis. Even some of the staff knows me. The manager seems to be new. I was (and still am) really upset that Burger King’s IT dept came up with a system which is for some an impractical solution to make use of your specials. I was so upset, I went home without ordering anything.

More importantly, Burger King is NOT attending to their customer complaints. I got already 3 emails with an automatic response. This morning an email that the case is closed but still no response