Increase Norton Security coverage to 2nd and 3rd PC

Hi All

I am curently covered by auto subscription for my desk top by want to extend coverage to other 2 pcs bought recently. I have tried to contact Norton but impossible to reach by phone (too many options also) and mailing not advised due to lack of appropiate certification? Can anyone assist, I do not want to pay double for the same service as has happended in the past and then spend an eternity try to sort out.

 

Regards

 

Pleb