If you accidentally make a transaction on the blockchain, it is irreversible and you will not be able to get your money back. There is no customer service or support that you can contact to try and reverse the transaction. So, be very careful when making transactions on the blockchain and double-check that you are sending the correct amount of money to the correct person before you hit the confirm button.
Other related questions:
Q: Can you reverse a transaction on blockchain?
A: Unfortunately, it is not possible to reverse a transaction on the blockchain. Once a transaction is broadcast to the network, it is final and cannot be changed or reversed.
Q: What happens if someone accidentally sends you crypto?
A: If someone accidentally sends you cryptocurrency, it will typically stay in their wallet until they send it to another address. If they accidentally send it to your address, you will be the owner of the cryptocurrency.
Q: How do I cancel a block chain transaction?
A: There is no way to cancel a blockchain transaction. Once a transaction is broadcast to the network, it cannot be reversed or canceled.
Q: Can a blockchain transaction be altered once it’s submitted?
A: A transaction on a blockchain cannot be altered once it is submitted.