That use of public Wi-Fi could have caused you some issues, if indeed you are innocent. I think the best thing to do if you are not satisfied with the verdict is to try to make a complaint via AskGamblers or CasinoGuru. That both you and the casino will present some information to the mediator, and they will determine if the casino lied or not.
I asked them proof of that, but hey are just copying pasting the same that you can see on images , if the yshow me some proof i can accept it, but for me is clearly a hard scam for me.... if my ip coincides just 5min with that accs because i used public wifi.........
Well, I don't know much about fortunejack but if they restrict you because you used a public WiFi then you must check their compliance to know if their ToS prohibited the use of public WiFi as I don't see that to be a major issue and caused to restrict you from having access to your funds. And if their ToS frown it then is utmostly important to adhere to their rules and it is also very necessary not to use them because even if you are connected for just 5 minutes their system would detect it automatically and send responses to them for public WiFi detection.