Fake buyer on Facebook Marketplace sends fake Uber driver for phone pickup

From Facebook marketplace this guy phoned me and said he wanted to buy a phone. He claimed to be in joburg and said he would send an Uber driver to pick it up. Uber driver arrived as he sent me proof of payment, which it turns out was fake. He took the phone. I discovered pop was fake before the so called Uber would have left Witbank where I was. The Uber guy and the "buyer" both blocked me on whatsapp. I believe them to be the same person or working together.