I went out for drinks at a local bar and had a few drinks before heading over to this person's house. I was intoxicated when i arrived at her place.We ended up getting high as well and I don't remember going to bed but the person I was with said I passed out and when I woke up  I checked my phone to see the time and noticed a transaction off my account of R5000. I immediately phoned the bank and spoke to the fraud department and had them block and cancel my account. At first I thought someone had stolen my card as I couldn't find it at the time but later found it in my car. I then asked this person I was with later that same day if I sent her money last night and she replied:"yes do you not remember". I told her I don't remember anything or sending any money like that last night and if I did I surely would not have sent it as I needed this money to pay for my bills. She told me she has used the money already to pay for her rent and I asked her to give me the landlords number so that I can speak with him and explain my situation. She ended up blocking me on all social media accounts and refused to give the money back. I don't remember sending any money to this person hence why I contacted the fraud department when I awoke. I don't know what too do as I need those funds to pay for my bills and she refuses to give the money back. What can I do ?