What to do about a Twitter bot attack

My friend's company is being targetted by a Twitter bot "attack." There are a 100 or so accounts that are obvious bots and that are posting untrue tweets directed at his company. Tools like Hoaxy have confirmed these accounts are bots, but it's also really obvious. All of them have a similar generic landscape background, a random quote from Goodreads, and except for these tweets aimed at my friend's company, they only have a few rewteets. I've tried helping him by using Twitter's report feature and even their contact us feature with a hand written message, but of course, nothing has come from this. We're not sure what the attacker's end game is, but it's placing a lot of stress on my friend and he's not sure what's next.

Is there anything else we can try? These are obvious bots that are spewing misinformation, but Twitter doesn't seem to care.