Sir,
You are providing intermediary service to non-resident company. Can you specify whether the non-resident company has any office or permanent establishment in India? If the non-resident company has its office or permanent establishment in India and such office/establishment is located in a State other than the State in which service provider is located then it will be inter-state supply.
If the service provider and the non-resident company has its office or permanent establishment in the same State then it will be intra-state supply.
Under sub-section (5) of Section 7 of IGST Act, 2017 " Supply of goods or services or both shall be treated to be a supply of goods or services or both in the course of inter-State trade or commerce provided -
(a) the supplier is located in India and the place of supply is outside India;
(b) to or by a Special Economic Zone developer or a Special Economic Zone unit; or
(c) in the taxable territory, not being an intra-State supply and not covered elsewhere in this section."
According to Section *8 (2) of IGST Act, 2017 " supply of services where the location of the supplier and the place of supply of services are in the same State or same Union territory shall be treated as intra-State supply."