While a bulk payment cannot be reversed, it can be unposted and abandoned, but only if there are no payment documents within the bulk that are reconciled with a bank.
The required authorization for this action is Bulk Payment: Correction Unpost. If you cannot add this to your user account on your own, you will need to contact your internal iplicit administrator to have it added for you.

Alternatively, someone else with the required permissions will need to execute the steps below to correct the payment.
1. Go to the payment. Click on the three dots > Corrections > Unpost.

3. After unposting, the payment will return to a draft state, and you will have the option to Abandon it.