UAT!!

I recently sold some one in item that they had paid through PayPal with the transaction went through and then two days later I got a notification from PayPal that my account was -$200. I don’t understand how they could’ve done a claim if that’s what happened so quick and came up with answer and also refunded the money and the fact that I didn’t have the money in my account. It’s weird. Also, when I click on the transaction to see any information on it, it shows thatapparently I sent a refund like it makes it look like I was the person who issued the refund on my behalf. it says money received in in pending and it shows a negative balance in my account. I looked up PayPal and claims and they said they usually take 7 to 14 days at least so I don’t know how this could happen within the 24 to 48 hour time span anybody got any idea or information thanks