Then he said paypal got bla bla bla and ask me to dispute
Then ask me again to close the case
First time I hear about this scam. It seems to happen quite often:
NEVER close a dispute until you have a cleared refund or your item.
You CANNOT re-open a closed dispute. Scam seller often say to close it so they can refund you and then when you do so you never hear from them again. You then find that you can't open another dispute for the same transaction.