warning

Hi everyone, I am posting this hoping someone can help me, or at least to warn others so they don't go through the nightmare I am currently in. ​Yesterday, I sold my laptop for €2,500 (around £2,100). The buyer came to collect it and showed me what looked like a very legitimate banking app on his phone (it looked like an AIB transfer to my Barclays account). He showed me the "Transaction ID" and the screen clearly said "Sent". ​As soon as he took the laptop and drove off, he completely blocked my number and disappeared. My bank has confirmed that no money is coming and it was a fake banking app scam. ​I am a student, and I worked incredibly hard for a very long time to save up this money. I am absolutely devastated, heartbroken, and don't know what to do. Losing this amount is a massive blow to me. ​I have his car details and I have the registration plate. ​If anyone has experienced a similar scam recently in the BManchester area, or knows anything about this tactic, please send me a DM. Any advice would be highly appreciated. ​Please be careful everyone! Never hand over your items until the money is physically showing in your own banking app.