Composition gst tax input

Sridhar (Student) (29 Points)

31 August 2019  

Dear sirs, I am facing a Problemin GST compositon biling, I purchased a laptop for 53000/-Nett inclusing 18% GST and Sold for my Client for 55000/- with GST composition billing without showing any GST.. Now client wants input 18%  because the laptop worth shows 43000/- in everystore without gst..

How can i overcome this and how can my client claim? 

Kindly help

Sridhar