I need to file a tax refund, but I'm in foreign country and don't have any U.S card or bank account. How can I file a tax refund with Turbotax in my case?

If you do not have a US credit card to purchase the TurboTax products then you will need to contact TurboTax support on how you should proceed.

See this TurboTax support FAQ on how to contact Support - https://ttlc.intuit.com/questions/3401489

If you do not have a US phone number for a callback then you can use these websites to contact support -

Support can also be reached by messaging them on these pages https://www.facebook.com/turbotax/ and https://twitter.com/TeamTurboTax