Need advice: did I just glitch the system?

Alright, folks, I think I stumbled onto a bit of a weird one here. I deposited some cash via bank transfer, but my bank flagged it for fraud and stopped it. Here’s where it gets strange: even though the deposit failed, my betting account still showed £200 in my balance.

Naturally, I withdrew the £200 back to my bank account, and boom—next thing I know, I’ve got £400 sitting there. So here’s the question: will they figure this out and come chasing me for the extra money? Or is this one of those rare “system glitches” where no one notices?

Not trying to pull anything shady here, but now I’m wondering if I’ll end up having to repay it or deal with some awkward follow-ups. Anyone been through something similar? What’s the likely outcome here? Let me know what you think!