Secureline VPN showing me its prices in different currency

Hello
I am trying to start using secureline for mac first with its 7day trial and then purchase it but
it is showing me its prices in KRW (wonder because i use mac in korean & english time to time?) but living in different country…
Then by making payment later, will it charge me in that currency such that bill me extra fees (like currency exchange) on my credit card? it is weird since on my other devices (laptops in window) showing me prices in currency of country i am living in and has been like that all the time and making payment just fine.
Or how do i fix this? re-install the avast security on mac?

Thanks!

Not sure but you may have more response in the Avast for Mac forum.https://forum.avast.com/index.php?board=5.0

You could also contact Avast and explain you issue in detail.
Contact Avast support:
http://support.avast.com > Scroll down and Submit a Support Ticket