100 USDT transfered from HuoBi Wallet and lost

I transfered 100 USDT from my Huobi Wallet (Heco type) to my MetaMask Wallet (Ethereum network). The money is lost. I added Heco network in my MetaMask Wallet, and I transfered some HT (Heco type) to it and well received the money. But I failed to find the missing 100 USDT in MetaMask Wallet. Anyone can help me out? Thanks.