The last dealing I had with them (years ago) got resolved by their retail location.
I called and spoke to the manager, then called back and shouted at him every day and promised to keep doing that until my issue was resolved. He got it fixed.
If you want to get it running I’d buy a new front pin and charging handle, then remove and reinstall the trigger.
Also, flame them on Facebook, IG, and AR15.com. That’ll probably get a return phone call.
