Whats my ex's problem??

I found out my ex had hacked my messanger account and was iming my bf junk and also pretending to be me so I wrote back to him to get off his b4 the cops et him and he told me to f off etc..So I threatened to call the cops and take em to court over messages he sent me and such I wasn really gonna do it but I wanted him to stop well..he texed me saying I shouldn't forget to te the cops about the drunk text I sent him from like that I should work on my grammar, Now I called his phone he didn't pick up and 2nd day I called back and his phone is not in service b4 this he wrote this long message sayin y he did what he did and he won't ever contact me again maybe til the "next life" wtf is his problem