Bad service ******* debits after insurance and credit shortfall paid out

Financed a vehicle through them that was ****** within the first 6 months . Had insurance and credit shortfall cover. When i called for a settlement i was turned away and was told to request the insurers to deal with them directly. Now months after insurers confirmed settling the claim and shortfall, i still get calls that i owe them Thousands of Rands and every month they *******ly try to debit my Banking account . Useless trying to explain to them they opted to cut me out and deal with insurers directly now they need to do that. Dont turn to me now and stop debiting my Bank account. No one to talk to and customer service non existing. Should have stuck with the large finance houses.