Can't answer the question directly.
But this article (which is arguing the case for using this 'tool' that has evidently been used against your business) explains why it is so powerful - and hence presumably why you are getting worried. It's all about protecting one's reputation. hardly a surprise therefore if some folks find legal ways of trying to undermine that.
http://www.netlawman..../statutory-demand.php
I'll decline to make the obvious remark about how to get the solve the 'problem'.