It sounds like they are not willing to pay your winnings, maybe because there was no deposit of money made to them. Since you played with the money they gave for free. It is definitely an unprofessional way to do business. All poker sites offer free money, so to speak, in a
"Deposit bonus" The difference is you have to make a deposit then earn so many
"Player points" by playing frequently. If those sites you both played on keep it up, They won't be in business very long. Word of mouth is a very powerful tool, And legitimate businesses don't like any negative publicity. So spread the word.