I started gambling at an online casino and won a very large sum and got it into my bank account. I continued playing but after some time I was hit by a losing streak I kept depositing with my Visa debit card and losing more and more funds until my card stopped working. At the end I had lost all the money I previously earned and on top of that my bank account was overdrawn by an amount I can't afford to pay back.

1.What are the chances of getting my money back by disputing the Visa charges and claiming they were unauthorised ?

2.If I don't succeed in reversing the transactions, am I being at the risk of being prosecuted by the bank due to the unpaid debt and be put in jail ? the overdrawn account is located at an offshore bank at a different continent.