Bad service from Wesbank- FNB

Very bad service - Settled my car and got a new vehicle , but the installment went off (31 May) already for the old car before the settlement was paid (2 june). Now 2 weeks later i called to find out were my refund is - only to be told that they will only process the refund now, as i only called now and confirmed the refund now. This means it will take another 2 weeks to be paid back to me. I will then have to basically pay for 2 cars this month