Unauthorised transaction logged against my account
I just need some help!!
I put my phone on facebook market place, was contacted by someone who said they would pay the money into my paypal account. They did this (£350.00) and then arranged to collect the phone. I have all messages from both the girl & her BF who were messaging me about collecting the phone. The BF came and picked up the phone and that was that. 2 days later I receive an email from paypal saying they've logged an unauthorised transaction and paypal now have put my account in -£350.00!! I have a crime reference number but I just don't know what my next steps are!