Need help , problems with buyer

Guys i have problems, i sold the item in Rocket League , “Slipstream” , the buyer got the item ( i have video how i sent him BM" , then i accept that i sent him item, and he didn’t rate me . He press “On hold” and said that he didn’t get the item, but HE IS, all is correct , steam-link , trade and another, I have proofs that i sent him.
what i have to do to get my money or item back( i think get item is impossible now)

Sry for my ENG :slight_smile:

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