Il do what i can to help!!
heat damage does, in fact, take away curls. DO cut off the damaged ends and get layers so the cut parts blend in
This video talks about recovering from heat damage
Curly Hair Update: Heat Damage + Recovery & New Hair Cut - YouTube
Also, don't use products with too much hold since they will just emphasize the bad texture you're experiencing at the moment, try a good leave in instead (not one with silicones that just covers the damage, but one that heals it) I hear shea moisture is good
Finally, try flexi-rod sets or braids to remind your hair of what it used to do
dont have to do the whole hair, just the trouble parts