ADP review: Garnishment over charging

My employee had a garnishment deducted from her check each pay period until all funds were paid. However, ADP held on to the funds for 5 months before sending it to the garnishment law firm. A total of $3,080.29 was deducted from her check from January 25, 2022 thru May 10, 2022. On May 19, 2022 ADP sent a check for $5,492.96 to the garnishment law firm, instead of sending the $3,080.29 (the amount that was actually paid out from the employee). This resulted in ADP overpaying by $2,412.67. At the time I was unaware of the error. I became aware August 2023 after ADP deducted $2,412.67 from my business checking account to cover the overpayment. I was told to contact the garnishment law firm to retain my funds. The firm informed me that typically they would return any overpayments to the sender, however the employee filed for bankruptcy and they were ordered to return the funds to the employee.

ADP should be held responsible for the accounting error and overpayment. I did not authorize ADP to take these funds from my account. They were to pay the garnishment and thats it. I am now stuck with a $2,412.67 charge. I need to find a way to resolve this issue.