Automatic renewal of AVG PC Tuneup - how to cancel

Hello Mark,

We are here to help.
We see that you submitted a ticket to our refund team and a refund in the amount 44.99 GBP has been initiated today. An e-mail confirming the same has been sent to you.
Feel free to contact us if you need any further help.

How do i cancel my AVG tune up and get a refund I only ad the trial and do not want to pay the £44.99 i have been charged. 
Hello Mark,

We are here to help.
We see that you submitted a ticket to our refund team and a refund in the amount 44.99 GBP has been initiated today. An e-mail confirming the same has been sent to you.
Feel free to contact us if you need any further help.