Payment taken when I cancelled years ago

I have had a large payment taken from my account. I have not used AVG for years. I tried to log in with the email account through emails I found in my bin, as I left AVG ages ago.. There is no account. Why after cancelling years ago have they suddenly taken money? The phone numbers don’t work and how to you email someone through the v muddled help page on the website? I managed to log in through using my other email account that is not associated with my payment. I want my money refunded AVG…