FNB refuses to provide me with proof of payment for my refund they claim they paid

My bond was settled in February 2012. There was a refund due to me of R8994.30. FNB contacted some attorneys which they do not disclose without my consent to retrieve my banking details. The attorneys provided a bank account that was closed at the time. So the funds never reached me, they advised me to contact my bank and my bank cannot retrieve the account and says that the must have returned to FNB. When I speak to FNB they refuse to provide me with proof of payment to Absa and the last consultant I spoke put me on hold and eventually dropped the phone in my ear. I have escalated my complaint as I am not receiving any joy with FNB and it seems like the consultants themselves don't know what is going on.