Good afternoon @Xinyi Chen,

Please install the App WTF. After you can check according this procedure:

1. Selecione “Saldo e Consumos”
2. Escolha “Consultar Histórico”

Good luck

Hello, 

@Jorge C gave good help, @Xinyi Chen,
Please tell us if the value was entered through the history. 
Best regards, 

I have downloaded the app but it does not shows the Saldo e Consumos neither Consultar Histórico. Also I would like to know what is gonna happen with the extra 15 euros charged?

It should be available in the App WTF, please double check.

Thank you

Hello @Xinyi Chen,

Thank you for reaching out to us.

Please confirm that you have your number registered in the WTF APP.

You should be able to check your balance and all the available communication on “Saldo” on the “Zona” in menu:

Thank you

My problem has been solved by the WTF team, thank you all for you help.

Hello, @Xinyi Chen.

We're happy to hear that the situation has been resolved.

If you have any further questions, please contact us. We're always here to help.

Thank you