Avis slow to return your deposit

My experience with Avis was good until it came time to return my deposit. First, it took 14 days just to close my rental agreement. On day 15, I received an email asking me to rate the service. What service? I had to make around 20 calls to follow up on my deposit, and even this morning it is still reserved.

Cape Town International Airport never answers their phone, and the customer care center does not work over weekends. This is ridiculous. You will never see me renting from you again, especially with all the bad reviews I have been reading as well.