OK here's the scenario. I bought a lovely guitar from a guy for peanuts. This guy needed money, I low-balled, he snatched my hand off. Guitar was supposedly set-up by a pro. Sure enough it was lovely. Action was perfect. But it was tuned an octave high!!! Of course once I retuned the strings came down on the frets. I slacked off the trussrod (single action) until it came completely loose and there's still not enough relief. Is there any hope? Or have I bought a decoration?