I often receive the verification code 106902950866 for Didi Chuxing. Is the software in my mobile phone stolen?

It should be noted that I also often receive it. I changed my mobile phone number last night, and then the balance was gone this morning, which cost me more than 900 yuan. I want to know why I can change the bound mobile phone number directly without going through the mobile phone. This drip safety system is too weak.