I want my Refund!!!!

I rented a car from Avis Menlyn.

When I returned it on 31 October and asked about my deposit refund, I was told that I will receive a notification within 48 hour with refund information. It's 8th November today and I have not heard anything from Avis about my refund. Every time I call to ask about my money, I am told the matter has been escalated to Finance and there is no feedback. I am very upset and at this point I feel like paying a visit to Avis Menlyn and sit there inside until money is paid into my account. I don't think I ever want to rent a car again from them!!!