I ordered a double Whopper no cheese, just ketchup. I received a double Whopper with cold cheese, smashed bun, all the toppings with almost no ketchup. The topping mix up has happened before and I just scrape everything off and use a lot of ketchup to cover the onion and mayo taste. I did just that and there was still something nasty under the cheese and I couldn't eat it. And I can't get the taste out of my mouth.
Whatever was on that burger is triggering my acid reflux and I've felt like I'm about to vomit for the past hour, which is when I ate it.