is that a deal?

[JadeRedstone]

last night I played a 4 persons HU shoutout which I qualified to through a freeroll. $5K for the winner.

When it was down to the last 2 we had the following convertation :

Player A : you want a deal?
Player B : What deal?
Player A : 50 50 winner go to next stage
Player B : ok.
Player B : I don't have $2.5K in my account

This is the only words we spoke though out the match.

so is the deal on?
Can I make him give half the winnings to me?
Is there anything I can do?