Igst , instead of sgst + cgst

XYZ is a transporter , he attached all L.R. copies .On LR copies his address & gst no. is Pune ,( Maharashta ) .

Service recipient party is also in Pune ( Maharashtra )

But transporter ( service provider )
raised bill on his Telangna state gst registration invoice.

Hence he charged Igst , instead of charging sgst + cgst.

Is this practice is fair ? (Transporter have both state his gst registration)