Ok so here's the full story. I'd been a member there for years, on the night in question I'd made 3 separate deposits for a total of £400 pounds. Just after 3am I placed my withdrawal for £1000 and went to bed.
At around 10 the next morning I tried to log back into my account and received a message saying my username and password was incorrect.
I contacted will hill who after trying lots of things eventually reset my password and allowed me to log back in to my account.
I was by this point a little anxious so immediately checked my withdrawal. I saw that I had no pending withdrawals so then checked my bet history and saw that at around 5 am my withdrawal had been reversed and there was pages and pages of bets over the next couple of hours.
I deposit straight from my bank card and they will usually only refund money directly back to there.
They may have tried to withdraw it by other means and failed I don't really know I was so concerned I reported it and my account was locked so didn't have the time to check every transaction they made.
All other online accounts I have do not seem to be affected at all.
Does anyone live with you?
Have you written down your account details anywhere, or even logged in when others were watching.
It seems only a small window of opportunity was available, between 3am and 5am. This suggests an "inside job".
The alternative could be that the hacker checked your account regularly by logging in at around 5am, and just got lucky this time. You should ask Will Hill whether there have been other logins from devices other than your iPad. If there was nothing to play, you would not notice such attempts.
The hacker seems to have made an attempt to buy time by changing your password after playing your money.
The last thing to check is the games played, particularly whether multi player games were accessed which would allow your money to be played away into the account of another player, rather than lost to the casino.
Although they said not to report this to the police, this should be up to you to decide, even if only to make an official statement and get a crime reference number. This would be useful if you are not satisfied with the outcome of the Will Hill investigation and want to take the matter further. If the police do decide to investigate, they can get records from Will Hill that they would never send to you, and they may throw more light as to how this was pulled off.
You should also run thorough scans on your PC to see if any malware is lurking there, and as suggested, change all other passwords in case the hacker has gained access to other accounts of yours, and just hasn't shown their hand yet.