£49.99 charge from Nexway?

I recently renewed my licence for Avast Premier late last year which was £49.99. Have just seen on my bank statement a charge of £49.99 from Avast Nexway on the 11th of this month? Yet I have not bought any other product from Avast. Any help would be appreciated.

https://www.avast.com/faq.php?article=AVKB24

http://support.avast.com/support/tickets/new
Request a refund: https://support.avast.com/support/tickets/new?form=11