Had to play Windows 7 again, suddenly the key was ...

Had to play Windows 7 again, suddenly the key was invalid. Only activation by phone was possible for Windows 10 with 3 selection options: one expensive, one only from the landline and the SMS option not available. In the afternoon you could only hear English telephone support, which you almost don't understand. Could now buy me a Windows 7 key again. Unprofessional how money is made here. I won't do Windows 10 right away.