that's why it's important to save the secret key when activating 2fa because it's very important when you lose access like this you can log into your account in case this happens you are too careless though 10k BFG is probably big money you think why don't you think about store the secret key somewhere.

But as far as I know the betfury team can help with problems like this, you can wait for an answer from the active team in this thread too, but don't forget to keep in contact with them via their site, I'm not an active gambler at betfury but you can ask the betfury team to disable 2fa in your account, of course, with proof of ownership, if you can't prove it, of course, your account will no longer be accessible. good luck