Is the amount being claimed a debt owed by the questioner, knowing that the original amount paid does not exceed 1500 euros, and what is being claimed is 9200 euros, and that the one who made the payment does not care about what is lawful and unlawful?

If the man requested 1,500 euros (1,200 euros + 300 euros) as the actual cost for extracting the papers that allow the questioner to go or live in Spain, then he is not obligated to pay any additional amount, and the man has no right to demand an increase beyond this amount.