Suspected ********** store

After viewing an ad on OLX of a Yamaha motif at a very slashed price. I contacted a one Chris Sanders, who quoted me R10 000 for the keyboard and R 200 to courier it within 24 hrs. After full payment on the 29th, I was promised delivery. Next thing im called by a Mr Anderson, telling me to pay R 2450 as insurance for goods in transit and this will be refunded once the item was delivered. Today still nothing, can anyone please advise how to get my money back. After seeing the exact event on hello peter...its clear that these guys don't even have any musical instruments