I had complications too. My band was leaking for 15 months. I gained weight fast and I struggled with hunger. BUT I stopped and took stock, and started focussing on losing again. And I did - 15 lbs in 5 months until I got my band replaced. Gaining and over-eating is not the band's fault, no one controls that but you. The band is there to try to help you NOT over-eat but it won't do it for you.
If you want to lose, you can do it with or without the band. I won't lie, it's HARDER without a band, but it's not impossible. I know it's frustrating having complications and not ever knowing if you'll have a functioning band, because it's something you can't control. I understand, I've been there. But there is ONE thing you can control, and that's whether or not you manage your weight in the meantime, while you're waiting for answers.