Account Enquiry

I'm so angry at this bank, I recently bought a car from Kia Dealership and traded in my old car which was financed by Westbank, we got a settlement letter and the dealership paid off the required amount to Westbank now when I check my statement instead of it saying account closed it states that I owe them R30 488 and they will continue to deduct over R5 200 on my account even after the dealership settled the car with them. I do not understand why I have to continue paying especially for a car that has been settled and is no longer in my possession, when trying to contact them so that they explain what is this ridiculous amount for their lines have been busy the whole day and one is put on hold for over 30min. I demand answers with regards to this. Getting through to them is a pain!!!