If the refund went to the the Green Dot prepaid debit card and you have issues with fraudulent charges then this is an issue you need to take up with the Green Dot bank. https://turbodebitcard.intuit.com/help-faq-s#disputetext
No one in this user forum can access your Visa account or help with it.
For help with your pre-paid Visa card:
Call (888) 285-4169
There is a “Help” link in the top corner of the web site for the card:
https://www.turboprepaidcard.intuit.com/