To complain or file a complaint against Burger King you can visit their u003ca href=u0022https://www.bk.com/supportu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003esupport pageu003c/au003e once on that page enter your name or login. Then you can answer some questions about your experience. Answer those and you will get a form to complain. This allows you to complain to Burger King internally. Also, if you want the public to know of your issue you can leave your complaint below on Corporateofficeheadquarters.com. The site gets thousands of monthly visitors and your voice will be heard. Another way is just to call Burger King's corporate office at 1-305-378-3000. Ask to speak to the customer relations department.