You should register on a different casino site and not use the same Android/Laptop, if you register with the same Android, of course your IP will be detected, of course they think it's multi-account, in general online casinos prohibit that.

I think the Stake casino doesn't believe you are the wife of a husband whose account has been blocked, this is a complicated situation to solve, because they can think that women can be hired to prove documents, This situation is not easy to solve, however, there is no harm in convincing them (Stake.com) in a situation like now.

In the future, if your account is blocked on one of the online casino sites, don't register with the same place, look for a new place to start fresh, so that your IP is not detected.