Of course this had to happen at Châtlet station.
I went to the information desk where she told me to go to Les Halles police station to report it. I logged the details which was filling in a form and getting it stamped by the Préfecture de Police when I asked if they had a reference I was told "no just that paper, take it to your bank".
Thanks PP awesome police work there.
The annoying part of it all is how long I had that wallet, 17 years I counted and all they got out of it was 20€ and a load of unusable cards. They also stole my receipts from the métro to claim half back from work. Dickheads cost me another 8€ with that.