A vegetarian said she threw up after being served meat at Eastville's Burger King.
Jayne Mitchell ordered the fast-food giant's plant-based Rebel Whopper and took the meal home to share with her son along with a Halloumi Burger.
But after one mouthful, she realised she had just eaten meat and had to quickly run to the toilet to be sick
Fuming, the Montpelier mum called the branch to complain and claimed the manager was 'rude' and 'dismissive'.
"He answered and didn't sound like he was listening," said the 53-year-old. "He then told me he was in the middle of serving some burgers.
"I explained what happened and he admitted it was him who did it and he mixed up two other orders before realsiing.
"He told me I had to contact the head office if I wanted to complain. He didn't apologise. When I asked if I could have a refund he just replied 'yeah'."
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After unwittingly taking a mouthful of the meat, she was unable to eat all evening.
"It made me physically sick," said Jayne. "Even before I became vegetarian I never ate burgers from those places because they are so processed."
After complaining to head office, a spokesperson emailed her back confirming an investigation has been launched into the incident.
The email read: "We have informed the field team and will work with the franchisee to investigate this issue to ensure that experiences like yours will no longer occur in the future and where necessary, reinforcement training or operational guidance will be provided to ensure that both service and products are served at the highest quality every time."
Burger King have been contacted for a comment but have yet to respond.
