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Is there still any chance this matter can be resolved?
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Well, this board is heavily monitored and swept routinely by someone who will forward cases to Stake, and that is the only resolution method currently available that our forum can provide. So, whether or not it can be resolved, I'll say it heavily depends on the evidence you can give to support your claim, like why it got suspended in the first place, your email [or was it live chat?] requesting to "refuse KYC" and thus get your deposit returned, and other thinkable screenshots that validate your story and build a good narrative for that someone to read and summarize to be forwarded to Stake.
Personally, when I read your case, what crossed my mind was whether or not you're in net profit. If the bet you made [you provided one screenshot] is the only bet you had and ever have on Stake, then "refusing to perform KYC" should return your deposit to the originating wallet. If you're in net profit, though, casinos does not have the obligation to refund principals as the winnings and other fund in the account is considered as their way to recover loss due to the abusive behavior.