My refund was never deposited into my old account. How do I get it mailed to my home?

Has the IRS actually released and sent the refund direct deposit?

https://www.irs.gov/refunds

If so, how long has it been since they sent it?

If the bank refused the direct deposit, it would go back to the IRS, who would issue you a check in the mail to the address on the return.

When the direct deposit information is not correct on your tax return, the bank will refuse the deposit and the IRS will issue a paper check and mail it to you at the address on your tax return.