Same case happened to me
Coincidentally, same case happened to me with these 2 travel agencies.
In my case i bought the tickets from insignia travels / my dreamz travel and paid them full amount -$5850. After completing the travel I also received call from Isha travels for demand of $7389 and legal notice. I already reported to police and seeking legal advise for this. Just saw your post, so wondering if we can discuss and work against this fraud.