Mr D fails to deliver

Used Mr D app to purchase at Burger King a few weeks ago. Food was not up to scratch and I lay a complaint with pictures with Mr D. I was not happy with feedback andcrep**** to them via email. They rep**** they will escalate the matter but nothing happened. I emailed Mr D again for feedback and no feedback to date. Why do you ask customers to rate food and service yet you do nothing if the customer is not satisfied? I spent around R300. 00 for a meal that had hair in it and the patty was soggy and stale yet it was supposed to be a 'crispy' fillet as per description. I am not happy with spending my money at an institution that does not pride themselves on customer service.