I sold 497.75btc for him, He sent 550$ paypal for me but today He open a disputed to paypal

Scammers Profile Link:
https://bitcointalk.org/index.php?action=profile;u=983186

Amount Scammed: $550 Paypal /$497.75 btc
Payment Method: paypal
Proof of Payment:
https://gyazo.com/0f47b349b7038c7e08a2863a7e750369
This is proof :
https://gyazo.com/2c05a45fa1496ee699850703f05ceab4
https://gyazo.com/4647fad13a6f1d63184711df4b8337ba
https://gyazo.com/0f47b349b7038c7e08a2863a7e750369
https://gyazo.com/ae262d30f8e7822145d0b2cfb842614d

He always say will cancel dispute, but I know him will never cancel .

https://gyazo.com/a132f19522a15ca2ad79b9c14fefbba0