TurboTax does not get your refund when the bank declines the deposit. The IRS misinforms people about this.
If you had your TurboTax fees paid from your federal refund and the bank declined the deposit, then the bank that performs the service to take your fees from your refund gets the refund back. They then issue a paper check and mail it to you at the address on your tax return. The bank is SBTPG. Here is how to contact them: https://taxpayer.sbtpg.com/login