I'm looking for a beautiful machine. Accidentally opened the phone, and the transaction was successful. Only later did I know how to cancel it.

Congratulations, you can't play by yourself. Sell your mobile phone. You won't watch it either? You lost money in this transaction and sold your mobile phone, but you can buy a better one. Be careful with these applications in the future. If it really doesn't work, you can call customer service. But your deal has been successful, which means there is no way out. Congratulations are the only thing here.