No GMs come here, so no one on the forums can push this through for you. You would have to submit a ticket. All you need to say is that you’ve applied the money to cover your chargebacks in Blizzard Balance, and you give your permission for them to use it to pay the money owed.
You can submit your ticket here:
https://us.battle.net/support/en/help/contact/180/ticket
If they send you a reply linking self-help articles, then reopen the ticket with the “I still need more help” button.