Shocking Service from Residential Letting Cape Town

I've been waiting for over a month for my rental deposit to be refunded. My repeated emails and phonecall go unanswered. According to the agent, they need to repair 1(!!!) lightbulb before I can get refunded, and due to the Christmas period their contractors were not able to attend to the matter. It's been a month since Christmas! Most businesses opened up at least by the 11th January... still nothing! The service from my agent has been shocking! I would not recommend renting from them. This is just the last straw in a number of other inconveniences I have just had to endure!