If you have money in there, try and get it out. If you're using them for World Cup bets then don't rely on them paying out, certainly factor that into your laying and liabilty anyway.
For more information on BetButler go to The Gambling Times forum, they've become the home of BetButler complaints. You're more likely to get information and responses there than you are from BetButler themselves.
As an aside, this post was written to satisfy a search tearm that brought someone here. I've nothing personal against BetButler. I got in and out and would've recommended them before it all kicked off and they started slow paying and slow settling bets. Now I couldn't recommend them, and anyone that is shouldn't be trused much either.