Go to http://kuna.io and register. Use any Master Card or Visa cards issued by Ukrainian banks to top up or withdraw UAH (Ukrainian Hryvnia)
Go to http://BUY.kuna.io no registration required. Privat24 or terminals accepted here. Unfortunately russian only interface.
If you need to convert in excess of $5000 USD please contact us by phone (preferably Viber, Telegram or Whatsapp). US Citizens $10000 per month limit. All other countries unlimited.