Vinted stole my Moncler jacket?

So I need urgent help. Sold my Moncler jacket very cheap and buyer pretended that it wasn’t in good quality, so I asked why and then I got a seizure and been in the hospital for 5 days. Now I open Vinted and he reported it fake (obviously real and code in jacket works on moncler website) and he won because I didn’t answer, so now he got money back AND!!!! my jacket????? What do I do? This is insane