After 2 weeks still haven't received my Deposit

I have returned the renatl car almost 2 weeks now and still haven't received my deposit. The i get an sms saying that Avis has taken out more money from my account after me paying a R2700 deposit they go and take out another R 2000. I will never go to hire a car from them. I rather be carless then have to deal with themn again. Please can you just pay me my deposit and the extra money that you took. On top of this i had to keep on checking up and calling to find out how far and how long you are taking.