Thank you very much, but I did not quite understand how I can use this key. I sent USDT from myetherwallet.com to exchange.blockchain.com (not wallet) and I only have a transaction link.
There are two types of USDT:
- ERC20 Token (based on Ethereum's blockchain)
- Omni Token (Based on bitcoin's blockchain)
If you managed to send the funds from MEW to The pit (blockchain's exchange) Ethereum address, it means that they do support the ERC20 token.
The exchange doesn't give you full control over your funds (no access to your private keys) though, so the only one who can recover the funds for you would be the exchange itself. If they said the address doesn't belong to them, you should consider scanning your computer, as you might have a clipboard malware that changes the address (to the attacker's) whenever you copy-paste.