Each passong month brings reduction in moning reward pool, so you've lost significant earning potential, even if Gigawatt gets your miners online today. Furthermore, the manufacturer's warranty likely has expired for your machines, and any future repairs will need to be paid by you.

From what I can gather, it is highly probable that your machines have been in operation since March, just not credited to your account. Dave Carlson and his ilk have likely used your machines to mine coins for their own accounts, and once your machines have been sufficiently worn-down, they will credit the machines to your account. Gigawatt is a nothing more than a Ponzi scheme.