Debit card hacked

Hey guys
I had already submitted a ticket to epic regarding this but I’m just so confused as to why this would happen. I woke up this morning as seen a 149.99 from Epic
I have not been on the launcher for a long time and have never even looked at fortnight. I saw that the prices match the limited edition and on the website, it tells me I own it. I have asked for a refund but I’m just confused as to why someone would buy that with my card? i have since replaced the card so hopefully it wont happen again lol