Stated facts recap (to the best of my ability)
1- Buyer (SPA) wired USD 14000 to seller (USA).
2- Buyer did(?) not do any due diligence/research on seller.
3- Seller is not a TRF "Trusted Seller."
4- Seller is currently banned from TRF due to unknown reseasons.
5- Buyer spoke with personal bank: Funds are gone/irrecoverable.
6- Buyer is unable to submit a police report in foreign country.
7- Buyer did not use a secure platform (like C24 with escrow services).
8- Buyer only has seller's email address; seller is unresponsive to attempted contact.
If those are the facts, then I would be on the phone with my bank wailing & doing everything possible to try & stop the payment. I would call one of the US Government's several overseas offices (have one in Madrid:
https://www.fbi.gov/contact-us/international-offices). Short of that, IDK what to tell ya...