This unfortunate event has been covered by several news agencies - 

Ananda Bazaar Patrika (ABP) Anondo
https://abpananda.abplive.in/video/tv-show/district/kolkata/another-dengue-patient-died-in-the-city-515258

Newsmen

https://newsmen.in/news/dengue-suspect-girl-dies-as-siliguri-pvt-hosp-refers-her-to-its-kolkata-unit/

United News of India

http://www.uniindia.com/7-yr-old-dies-of-suspected-dengue-fever/states/news/1353586.html

Millennium Post

http://www.millenniumpost.in/kolkata/family-alleges-negligence-of-city-hospital-behind-minors-death-319191

As you all can see, with specialist opinions - the sweet girl needn't be transferred from Siliguri to Kolkata in the first place! Spread this news to anyone you all know - it's time people knew about dengue and about medical malpractices! No other child should die due to the commercialization of medicine.