I use my phone to bet and use mobile data since I'm out of the house most of the time I bet, will that trigger an IP issue since it's a public IP? I see that some people also faced the same problems but were able to withdraw their funds.
You did not use a public WiFi but using your mobile phone to access the site. So that can not be the reason for the ban. What I guess is that you may have WiFI at home and one if your family living together with you may have an account in the gambling site.