I'm sorry to say this, but you have been scammed. Using the official Limewire site, you can only subscribe for either 6 months or a year. There is no 3 Year plan.

From what I read it seems you bought this subscription a while back, so that money has gone down the drain.

If you want to subscribe to Limewire Pro then Lime Wire » Official Website & Free Download, BitTorrent « is the one and the only site, where you should do this.