Hellu!
My account is premium and i havent donated since few years back.
Before when the server was unstable and changing owners etc etc we all lost everything and could refund our coins to our accounts (which i did, but no coins atm), is this still possible to get our coins back? Had ****loads!
Dont seem to find instant leveling for Frostwolf either? Is there even instant leveling for Frostwolf?
You had to use those coins within like 2 months. Then they expired. You most likely won't be able to get them back. Officially any chances to get them back have been discontinued long time ago but if you want you can try to make a support ticket on website and ask them directly.
Character levelup is available on website under services (not store) and costs 20 coins.