To refund, you must contact the airline or service provider, and information about the refund will come in "Invoicebox" system.
In case of cancellation of a ticket or purchase, a 100% refund is provided; the invoice will be cancelled after the refund, and the available limit for purchases or tickets will be increased by the refund amount.
In case of a partial refund provided on cancellation, you must first pay the invoice issued to pay for the ticket or purchase; after receipt of payment, the amount intended for refund will be transferred back to the account of the company that paid the invoice.