got scammed by buyer who not giving my payment

i sold an tw apex for 90.50 (got just 80) and i deliverd the item and he just removed me after a sec and he did the trade on hold, what do i need to do? i took screenshots and sent a massage to gameflip with the screenshots.
i need to worry about it?

Just to make sure that you actually sold something, does your listing appear in ? Please give your invite code or order ID so a moderator can help you.

thats my tw apex scam code


Please contact us at, and send us all evidence that you have about this case.

We will be able to provide you further help then.