Coca Cola QR Code Not Working

I have been experiencing a problem for about the last month with the Coca Cola Daha Daha application regarding the free 1 liter Coca Cola QR code. Although I have a valid QR code for a free drink, the businesses where I try to use it do not provide the free product and the campaign cannot be used in practice. Despite repeatedly attempting to redeem the QR code at different times, I have not been able to obtain the free 1 liter Coca Cola. Since I could not get any results from the businesses, I have not yet contacted Coca Cola or Daha Daha customer service. I request that the free drink promised to me be provided without any further issues and, if necessary, that a new usable code be defined. In addition, I expect compensation appropriate to the inconvenience and wasted time caused by the fact that I could not benefit from the campaign for about a month, even though I had a right to it.