hello i would like to upgrad my account from pro member to unlimited. but my contract for pro runs until december 2K19 and i have already payed for the whole year. so my question is , if it's possible to upgrade my account and just pay the difference for the next months until december ,when my pro account runs out?
cause if i want to upgrade it online, they show me that i have to pay the complete fee? how could i make this happen?
looking forward for ur reply