Having not been paid, Bianco and Villagran decided to take a more gung-ho approach to secure payment for their alleged involvement in Yacob's move to West Brom.
Villagran and Bianco have also been unable to provide CNN with any written contract that sets forth a relationship with Yacob in relation to the transfer to support their claim for compensation.
"Villagran did not perform any agency services either on behalf of the player or the club in respect of the transfer of Yacob to WBA, " DBW Global Limited said in a statement sent to CNN.