I downloaded a software, ignored it, and clicked to allow texting. As a result, I sent a message of fee deduction, 20 yuan. There are more than 19 in my mobile phone card.

Can be deducted. You owe a dollar if you deduct it, but I'll teach you, you can call the manual service to get the 20 yuan back, explain your reason, and say it's carelessness. If she doesn't answer directly, you can ask him to ask the manager to tell you that you can get it back as long as you stay for a while. I accidentally deducted my fee for playing games before and got it back.