If you used the Turbo prepaid visa, the funds should be connected to that account. You'll need to contact the bank associated with the card in order to get a replacement card, if that's your situation. Using the IRS as a resource is your best bet.
More information here: Second Stimulus, Turbo Card, GreenDot Resources
Each person will have a different scenario depending on how you completed your taxes and your eligibility with the IRS. Reaching out to their internal hub will give you the most accurate information.
This link will help you find the status of your payment: Payment Status Information
In some cases the IRS is issuing Debit Cards. Here is more information on that: IRS Issues Debit Cards for Stimulus Payments
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