Standard Bank Home Loan - Huge Deduction and NO REFUND

On Tuesday, my property was sold and registered in the name of the new owner at the Deeds Office. It was the very last day of the month, so Bond Clearance figures provided by the bank could have been calculated pretty accurately. Well, not only was the full outstanding bond amount figure provided to the coveyancers as settlement figure, but also an additional amount equal to TWO additional months worth of Bond repayments, almost THREE months of interest on the outstanding balance. It has now been 4 days since transfer, ample time for Standard Bank to refund this substantial amount to me, seeing that the entire outstanding bond had been settled. So, I called them this afternoon, only to be told that it could take a long as two months before my refund it paid. Now that's ridiculous! First, they deduct way too much and then they keep it for months, for no reason?? The bond has been settled, Standard Bank! Why don't you process my refund?