Her sister, Chloe, said in a statement read by a family friend, Ellie Foulkes, outside court, that the family were going through “the worst possible heartbreak”.
“Our Demi was a beautiful, outgoing, very confident girl and she didn’t need the surgery at all.
“She went for the sake of her feeling like she wasn’t good enough in herself,” she said.
“Our Demi hasn’t just left her family behind she has left the most beautiful little boys.
“Forever and always in our heart Demi.”
She added: “Sleep tight.”
She urged people to do “more research” if they were thinking of going to Turkey for surgery.
The coroner told Ms Agoglia’s family he would write to Health Secretary Wes Streeting.
“I do feel something further needs to be done to stop this frankly barbaric medical practice being conducted to such low standards that would certainly not be tolerated in the UK,” he added.
The BBC has contacted Comfort Zone for comment.
A Department of Health and Social Care spokesman said: “Our thoughts are with Demi’s family and friends at this difficult time.
“It is unacceptable that people’s lives are being put at risk by inadequately trained operators in the cosmetic sector. The government is urgently exploring options for further regulations in this area.
“The safety of patients is paramount, and we would urge anyone considering cosmetic procedures to consider the possible health impacts and find a reputable, insured and qualified practitioner.”
Additional reporting by the Press Association.
