Crappy situation
Hey I know this thread is old now but I just wanted to say that I hope everything ended up working out. It looks like it didn't get completely resolved since I followed your links and the negative reviews are still there. But I did my part and flagged the fake comments as such on your company's Google page and the other one that posted asking for help.
I've had this happen to a friend's accounting business and he had to go through the same stuff. The competitor claimed he never did it but he even used the same username on about 7 different competitor's pages and had the exact same story in his comment (ridiculous).
Again, good luck and hope all is well.
