USDC Deposit stuck for 3 days with 18k+ Confirmations

Hello, I need help with a deposit that has not been credited.

I sent 264 USDC and the transaction is fully confirmed on blockchain (thousands of confirmations).
It shows as “Confirmed” in my Gameflip account but the funds are still not credited after 60+ hours.

I also made a small test deposit (0.21 USDC) which was credited instantly, so this one seems stuck or under review.

I also opened a ticket 3 days ago and haven’t got answer, this is my request: (1151833)