Can't conmect my phone number

Hey guys I want to connect my phone number to my twitch account but I can't. My number isn't connected to any other account and I don't get an error displayed after adding it. It says me that there has been a verification code sent, but I don't receive it, no matter how many times I try. I really don't understand why it doesn't work and what makes it even more weird is that my phone number is connected for the 2FA but not with the account itself. Does anyone know what might be the problem?