Reactivating AVG

I have received an email to reactivate my product after I had bought it but when I follow the instructions they don't follow the pattern I have been told to expect so I am unable to reactivate. What can I do>

Hello Lyn,
I do understand the inconvenience you have faced, I will definitely try my best to fix it for you. May I know if it is AVG Internet Security or AVG TuneUp - Unlimited that you are trying to activate?