Good post OP and hope you are ok now
It is easy to say "forget it move on"
A lot of people can do that some like myself struggle, everybody reacts to these things differently.
I had a slightly similar situation for a while it wasn't as direct and was more semi-threatening stuff and I let it affect me because for whatever reason they knew a lot of detail
I changed the sim very shortly after this period but again for some people including me these sorts of things play on the mind for a long time, I wish it wouldn't