zoe hadley , 19 , was found dead in a hotel in putney , south west london .
teenager had been battling an undiagnosed illness since she was 13 .
her parents , a leading solicitor and a gp , struggled to treat her condition .
inquest heard how she refused to accept she had mental health problems .
for confidential support on suicide matters in the uk , call the samaritans on 08457 90 90 90 , visit a local samaritans branch or click here .