I have some false payments that were imported into my QBO that need to be deleted.  We are an automotive repair.  If we void a payment or refund a payment in our automotive software, it imports into QBO as a payment instead of a void or refund. Our bookkeepers did not catch this problem.  They have reconciled our books and now I have over $100,000 in false payments which reflect as credits on my customers accounts in QBO. When I try delete them in my customers profile it says:

This transaction has been deposited.  If I want to change or delete it I must edit the deposit it is on and remove it first.  When I go to the deposit in the bank register it matches by bank statement.  There are usually multiple customer payments in a single bank deposit.  My unapplied cash payment income needs to be cleaned up and is mostly false payments but I don't know how to do it.  My bookkeepers that I have now fired say its no big deal to just run my reports is accrual and it will go away.  We are a cash-based company and file taxes as Cash.  Help!