Please contact Credit Karma on their Contact Us page.
See these resources for more information:
See Offer details and disclosures for the Refund Advance program for more information.
TurboTax Help article When will my refund be deposited into my Credit Karma Money™ account?*
Credit Karma's What is TurboTax Refund Advance?
Make sure your accounts are linked: Linking Credit Karma with TurboTax Account