Deposit ****

I moved out of afhco in June and had to send numerous emails requesting for my deposit back and only received a response after texting them on Facebook. I paid 5.500 deposit when I moved in and they only paid me 600r deposit back. I gave them my notice in time (21 working days) my unit was kept clean and there were zero damages so I'm failing to understand wr the 4.900 went. I want my deposit back coz this is day light *******