Bitcoin/Ethereum/... transactions are irreversible, once you’ve sent money to another Bitcoin/Ethereum/... address it is not possible for you or Remitano.com to reverse it. We are very sorry for those cases, so be careful with your Bitcoin/Ethereum/....
Please note that the same wallet can have multiple incoming addresses. The Bitcoin/Ethereum/... protocol ensures that Bitcoin/Ethereum/... are not sent to an address that does not exist, but they can be sent to addresses which are inactive or not controlled by anyone.