This morning I submitted a complaint to the license provider, Antillephone.
I'm not sure what good will that do but I wanted to try anyway. It's something I already did 3 weeks ago but now there are more information and further looking into it I may have gotten the wrong email the first time around. Transparency is definitely not their strongest suit.
I have checked with your picture proof and saw about why your stake account banned because multiple account detected, although you not created more than one account but you have submit document linked with other account. I can't thing your problem will solve how much fund loss, your money freeze because Stake gambling platform not allowed crated multiple account.
I don't sure about your document use have linked at other account or not but due the costumer service respond seems your mistake here, actually you can ask the costumer about account linked with your document. Possibility another people used your document if Stake KYC progress doesn't need take selfie and upload document ID only.