AVIS not returning funds over charged - *****ing

Avis has overcharged me by the 'holding amount' of R5000.00 and has not released or returned funds. I have contacted Avis countless times to no avail. This is in effect *****ing from me. Client services have been useless and failed to do anything about it. <br> <br> I understand the Holding deposit is used. But this was deducted and has not been refunded for over 2 months. I have lost out and been charged by my bank. My bank has confirmed the deduction!<br> <br> RE: E*** [Case: DpHiZK, Reference: xcnPNT]