What happened after receiving the text message saying that I would change my visa online?

Don't trust this short message, and don't call the customer service number above. Many of them are fraudulent text messages. You can ask the airline yourself if it has changed its flight. Cancel or modify orders that have not been issued without charge (except for team tickets that have paid the deposit); When the issued order requires refund or change, it should be implemented in accordance with the regulations of each airline, and the corresponding refund or change fee may be charged.