No Deposit refund

I handed in my notice to Vacate to Mafadi to Vacate on the 1st of January 2018, I was then told I needed to Vacate the premises by 12pm on the first or chose any day to Vacate in December 2017. I vacated my unit on the 23rd December 2017, but till today I still have not received my deposit refund. When I spoke to the person responsible by the name of Dineo, he promised that my deposit will be refunded on Friday 19th January 2018. it is now the 22nd January and my deposit still has not been refunded. Mafadi Property Management, I was a good tenant and always paid my rent on time, what will it take to get back what is mine. Please pay back my deposit refund. When I call Dineos cellphone it does not get answered