Vibe Check/Madmanboo scammed me!

Scammer's profile link:
Bad Boo

Explanation of the trade:
I sold an account through middleman to this human. The trade took place in Elite Ranks through the wallet system. And, through Discord group chat Middleman (Admin of Elite Ranks, DJ), this human, and me. The trade was to sell an staking account 07 for 150m 07 gp. The trade was as this, 1st payment from this human is sent to Middleman (DJ), funds are confirmed, and then I give complete full email transfer to this human. The second half is not solvent. I agreed to give full email transfer to this human as we had agreed, with Middleman present, that in the meantime, as this person gets the second payment done, I would be able to also access the account and make normal use of it until the second payment is paid. Resulting in a straight away password change of the account (I no longer have access to it) and zero willingness from this human to obey as this human had agreed, with middleman present, to give me access to the account until the second payment is done.

Amount scammed:
The second half of the trade, 75m 07.

How they scammed: Not providing me access to the account till the second payment is paid, plus, not paying the second half of the trade.

Proof that it's their Discord:





Discord ID + Unique Discord ID:
Bad Boo#0001 UID: 318101967752790016
Big Guy#0352 UID: 540893096838430731
pipi#1125 UID: 619618437924257802
hi UwU#6454 UID: 640185160200880149

Other relevant trade screenshots:

 

Discord ID + Unique Discord ID:
Bad Boo#0001 UID: 318101967752790016
Big Guy#0352 UID: 540893096838430731
pipi#1125 UID: 619618437924257802
hi UwU#6454 UID: 640185160200880149