Graham,
You have paid for AVG TuneUp - Unlimited (1 year subscription) via Digital River. Do not worry, we are using Digital River as our Payment Gateway method which is legitimate company.
Have a look at this link: https://en.wikipedia.org/wiki/Digital_River to know more about Digital River.
I paid digital River Ireland the sum of £20.99 2/12/2017 for AVG Tune up 12 month cover is this a bonafide company or have I been scammed
Graham, Also have a look @ this link (https://www.bloomberg.com/research/stocks/private/snapshot.asp?privcapId=32980892).
AVG Guru