Happened at Yishun Ave 5 blk 102. Met this girl online on and booked her service after she got my number. I got this call from an unknown number asking me to purchase $100 iTunes card for him. Then, got another call to transfer $1200 for her "protection". After sending him the money, I was asked to send $1,800. This was when I realised I got scammed and filed a police report. I didn't reply or answer their calls and they threatened to hunt me down. 

Don't be threatened by their empty threats as these scammers are not located in Singapore. Threats are used to make you pay!