Thanks for your response FJ. I really appreciate your decision to share your experience with us.
Let's forget about the terms and conditions for a few minutes because we all understand and know that by showing the terms and conditions a bookie can make anything possible in their favor unless it has been taken to the court and the law has a different view in it. We are not the law makers but bunches of shitposters who have no day job (possibly) and spend all the day in an anonymous forum for nothing LOL. Bitcoin is a drag and I blame satoshi to create this forum. Theymos also need to take some blames :-D
Anyway jokes aside, lets be serious and let me explain my view considering the following quote from you:
In the concrete, the odds of the match that @EpicChamp chose, was mistakenly supplied by the official partner of our betting data services, betradar. Right after, our in-office specialists received the message regarding the technically / mechanically typed out odd, including the recommendation to straightaway cancel the on-going bet, our team had to as well take immediate action of terminating the bet slip and removing the remaining balance from the account.
~snip~
As for now, player has already withdrawn the initial deposit in full. The remaining stake and a possible winning amount were not credited to the player, as both of the events arise right after classifying the case under the technical/mechanical fault, meaning that odds were mistakenly sent out from betradar. Bet was canceled before it was being played, so we don’t think it’s fair to be talking about the fact of receiving the remaining amount + the possible win.
Please pay attention to both bold fonts.
on-going bet
Bet was canceled before it was being played
So it was suppose to be on-going bet/s and it's completely fine with me. In fact, in my first post in this topic I said something similar to the OP that they (you) informed you (OP) before the match started.
Anyway, according to the player he cashed out partially before receiving your email. Once I will cash out something then this is my money. Correct?
The other partial was ongoing bet which had the stake 0.067 BTC, in other words the on-going bet had an stake of 0.067 BTC.
When you cancel a bet you return the stake and keep the winning (if it was won).
So technically in my opinion, considering the mistake that happened from your provider, considering the communication time, considering the partial cashing out before the email sent, considering the on-going bet after the email sent - I think you owe the OP 0.067 BTC which was his stake by that time after you informed him.
This is what I personally think will be a fair ending. Again thanks for your response and happy new year ahead.
Cheers,