Altomatic renewal after unsibscribing

I unscribed some months ago but the tune up thing was still active and I didn't realise.  They took money from my account for another year :(  .
As all my unsubscribe was done on AVGs site I have no email confirmation of this request.
 I contacted for a refund and was told my account has now been unsubscribed (took a copy this time) but I have still paid for another year.
What are my chances of getting a refund for the sevice I thought I cancelled??

Hello Hugh,

We are really sorry to know this.
We will check and help you with this issue.
We have sent you an email informing about the AVG product details and please reply to that email for further assistance. 
Thank you.