Paypal — Item not received

Address:

D - 46 A, Dayanand Block, shakarpur, shakarpur, shakarpur

I paid 260$ to [protected]@gmail.com, on 15th of july and he asked me to wait untile receipt confirmation appears on my acccount, it appeared on 18th and i approved it and on the same day suddenly he told me that he refunded my amount and shared the screenshot with me with txn id and asked me to transfer another 200$ to his friend paypal, and said will give 2 pair of shoes in 200$ now and earlier he was giving me 1 in 260$, i refused and said let us wait until i receive the amount refunded by you, i lost my trust on him as he was not selling authectic shoes, and i raised dispute on paypal and their people wrote that seller had accepted the refund and they will inform me once they will process and suddenly today my case is closed on paypal saying that "based on merchant response and the information you have up to date, you will have to deny my claim and billing dispute doesn't match your qualification" and i will to appeal again, i appealed it but they have closed my case, now it is again in under review, but please help i have not received my product