If old bank account details were added to your Stripe account, your payouts will have been sent to that bank account.
You should contact your old bank to find out what will happen to the funds. You will need to provide the following information: bank account details, date expected, exact amount and payor (Stripe).
If incorrect bank account details were added to your Stripe account, your payouts will have been sent to that bank account if the account number and/or routing number exists.
If that bank account does not exist, the payout(s) will be returned to your Stripe balance. If your funds have not been returned to your Stripe balance after five working days, contact Stripe Support.