Transactions on blockchains are irreversible, so the only way to get back your tokens is to ask the owner of the address to send them back.

• You can reach out to the customer service to get back your tokens if the address is owned by a platform.
• You can ask your friend to turn back your tokens if the address belongs to him.
• You can try to contact the project team to ask whether it is possible to retrieve your tokens if the address is owned by a smart contract.