Incomplete Payments or Incomplete Deposits

I am in the process of cleaning up old incomplete payments/deposits and I cannot figure out how to delete payments that did not process years ago. If a payment and deposit is 1 for 1, I have cleaned those up but if there is a deposit that has 10 customers on it and only 1 did not process then I can't get those cleaned up. The ones that did not process are marked as in a Worksheet, Applied, Unidentified or Identified.

We have confirmed that the person creating the deposits back then did create a new deposit and apply it to the customer account so we only need to delete the payments/deposits in incomplete status. Any help would be greatly appreciated because some have been in this status since 2012!