I am posting this so others can decide before depositing.
Based on this experience, I strongly recommend avoiding 1XBIT.
I am still open to resolving this if 1XBIT decides to finally engage constructively.
You're not the only one; the whole community is against 1Xbit and considers it to be a scam. We have a pinned thread about 1Xbit for everyone to see. They've got that warning because we have seen an avalanche of complaints against 1Xbit that could erode people's confidence in playing at online casinos.
And I don't think 1Xbit is open to resolving your issue, you're just another player they're happy to scam and not a special case to resolve your complaint, so better not hope of getting this resolved and just give warnings to your friends not to play on 1Xbit.