Deducting installments for closed accounts

Settled my account in the beginning of April, received the registration documents for the vehicle, but on the 30th of April another debit order was taken off of my account.

Calling their customer service I was informed I would have to wait for the funds to reflect on their side, and then I will have to call them back again to arrange for a refund. They can see that a debit order was loaded against my account, but no, that's not good enough to return my funds. Not so much as an apology. They'll take your money and then (hopefully) return it when they feel good and ready.