I think I read about BC.Game bankruptcy in the news before. I didn’t realize it was because of this case that they declared bankruptcy and simply switched jurisdictions.
https://www.curacaochronicle.com/post/main/curacao-court-declares-bankruptcy-for-blockdance-and-small-house-amidst-unpaid-player-claims/To me, it’s clear that if you won your case in court, you must have provided enough evidence to rightfully claim your winnings.
Regarding the SSO option, it’s very easy to accidentally click on “Sign in with Google.” It has happened to me several times on other websites too.
As you mentioned, you never played or used any bonuses on that account, so this really feels like an excuse to deny your withdrawal.
This is how everything went:
1 - Our lawyer sent them demand letter for the claims and multiple follow ups
2 - They ignored everything
3 - We filed hearing in the court, to which they responded, providing non existent evidence.
4 - They even went further adding various statements across their website about them being owned by other company, and they only bought the brand, not the playerbase and previous claims. None of this existed before lawsuit (provided in the productions/evidence)
5 - During all this conversation, there was only one attempt in reaching us out (CEO Jack through lawyer, and never responded to our lawyer's request)
6 - They started spinning that all claims were illegitimate, even though for each claim, all players had enough evidence of them. Out of all these, only 1 player was "eligible" for claim.
7 - Filed for bankruptcy hearing, after which they started (actually) producing fake evidence (one of them provided in Imgur album). Please note, to this date, there was no single evidence of any illegitimate actions done by player.
8 - They were declared bankrupt by court of Curacao because they were ignoring the ruling and court appointed trustee. To this date, trustee was unable to get any funds from liquidation procedure because they had zero assets (no bank accounts, nothing) in curacao
9 - They started with various statements saying they are opposing the ruling and will appeal.
To this date, not only they did not appeal, but they jumped to another legal entity registered in Belize, with license issued in "autonomous island of Anjouan" ignoring any requests to comply with ruling, or paying out the claims.
Damn, that's a shitty situation. Especially the video with the 2 accounts under the same email really looks messy.
What exactly did the casino guru thing bring. Did BC provide evidence for their claims so that CG can make a ruling. Also, you actually never played or got any bonus ( clean transaction and betting history ) with the other account I assume?
I've tried numerous times reaching out to BC.game to get this resolved, only for them to ignore me and just c/p same response. Later on, I've (and other players) filed a lawsuit against them for not fulfilling claims, which we won. And they were declared bankrupt. Only to avoid paying out our winnings and switch jurisdiction.
I am aware of this situation, this was in around November/December last year right. A court in Curacao declared them bankrupt so they quickly left the country and got a new license on some even smaller island.

I didn't know this was because of a court case against them though, even more messy.
In here BC makes raffles and giveaways all the time, but treating their players fairly is not on their agenda. Cutting bonuses in half 1 day before paying monthly/weekly last year, raising house edge over night without notification an so on, that's terrible. I also left the site for good a while ago, couldn't stand it anymore.
They did provided some sort of evidence to CG, after which CG representative rejected our claim. But, please understand that during any point in history before it, they never provided any evidence directly to us, simply because I was never doing any foul play. Deposited money, played normally, withdrawn on several occasions. Only when my winnings hit over $1m, they decided that I am in breach of ToS and banned me.