Debit to my Paypal account

Hello John,
I have checked your records and realized that you have been charged for renewal of AVG PC TuneUp (1 computer). When you purchase an AVG subscription (formally known as "Continuing Protection Service"), the subscription will continue until you have cancelled it. Customers will be billed 15 days prior to the start of the next subscription period. Customers will also receive an email regarding the automatic extension of their AVG subscription, 45 days prior to the start of the next subscription period. Please confirm if you would like to get refund for this order. We will assist you further.

I have noticed a debit from my Paypal account . I have no recollection of signing up for anything recently. Why have I been charged over $80 AU  for somerhing I dont want or use?
I  note the comments about this automatic roll over of free AVG trails etc. This is unethical as far as I am concerned and a poor reflection of your company grabbing at people's money when they have poor computer literacy. I am requesting an immediate reversal of funds. I have an inactive email account that may be linked to this debit to your company. You need to contact me on the one I used to register for this account so I could contact you. 
I am very unhappy with the way your company seemingly has done this to many many other people. 

Hello John,
I have checked your records and realized that you have been charged for renewal of AVG PC TuneUp (1 computer). When you purchase an AVG subscription (formally known as "Continuing Protection Service"), the subscription will continue until you have cancelled it. Customers will be billed 15 days prior to the start of the next subscription period. Customers will also receive an email regarding the automatic extension of their AVG subscription, 45 days prior to the start of the next subscription period. Please confirm if you would like to get refund for this order. We will assist you further.