Exemption on Air Freight on SEZ Exporter

We are the IATA Agent we have received CSR from Airlines for Air Freight Charges including GST on Freight Components,

Our Exporter doing Business with us there are factory suitated Special Economic Zone

Now, We are facing problem in Our Bill to vendors without GST.

Problem is We are paying GST to Airline s and not GST claim our SEZ vendor

Please let us clarify the way of Billings

regards Arunkannan