You 'bought' the free Home edition ?
Where did you buy this as the Home (avast 4.8 Home) is free ?
So if this is the Home version, you have most likely been scammed by someone selling 'support' and not the free Home version.
I suggest you remove your email from your post as it could be harvested by a spambot.
What avast version are you using 4.8 or 5.0 ?