Indigo Airlines — flight getting delayed and still no proper feedback. my infant child is facing lots of problem

Address: Gurgaon, Haryana

My flight 6E175 from varanasi to mumbai via delhi on dated 13 june 2015. It departs from varanasi 1 hr delayed. After reaching to delhi still its not prepared to take off from delhi to mumbai.Already its delayed by 4 hrs till now. Further also there is no positive sign. My infant child and another child of 7 yrs both are facing problems due to hunger and thirst. From airline side not satisfactory behaviour. Please do the needful.