Please release my money

On 20 May I rented a car at AVIS through the insurance as i was involved in an accident.The rental duration was 20 days, meaning it expired on the 07th of June. I paid the holding deposit of 3700. When the 20 days expired my car repairs were not yet completed so I had to extend by 5 days from the 10th to the 14th of June. This time I paid everything from my pocket because the insurance wasn't gonna rent again. I paid 8600 for days rented plus deposit. On the 27th of June they called me notify me that they were trying to unblock/ release my deposit but they mistakenly blocked R2479 by mistake but I shouldn't worry, they will ask the bank to release it. Today is the 23rd of July, that money is still blocked and nobody in AVIS cares. When I call their contact centre they can never put me through to the centurion branch. I've written several emails to one specific Basetsana Legodi and I keep hearing that that they'll ask the bank to release it. In the last email she asked me to resend my credit card number so she can get customer care to assist. I sent it, again no word or action from their side. I regret the day I stepped into their offices.