no, I have been told that in some cases it is best not to acknowledge a lawsuit by a lawyer.
I’d love to see a citation on that.
Then you need to get your money back on that course. That can get you zinged for ridiculous amounts of money. (I have a family member who *is* an attorney.) You’re not supposed to acknowledge as in comment publicly, but you are supposed to respond in the court system lest you get a default judgement lodged against you.