Wallets – Cryptocurrencies falling into the cryptocurrency world due to blockchain disruption

The transaction entity processed the withdrawal and sent the estimated USDT to my wallet address. However, the USDT I expected did not arrive in my wallet. Upon confirmation, the trading platform support team claimed, “Your withdrawal has been completed. The reason your withdrawal has not arrived is because your withdrawal has landed in the cryptocurrency world.” He even suggested, “You should hire a professional technical team to help you link your secret key so you can complete the withdrawal.” What should I do and what should I do to recover my funds?