First, sorry to hear about your struggles man. Unfortunately, this is nothing new and AI makes their money selling stuff to militaries and agencies. If you want fantastic customer support, you'll have to look at a different company or get a custom rifle made from a reputable 'smith. That isn't a bash on AI...at this point, we should all know what we are getting into.
I say this, and my dumb ass bought a Sako TRG recently...so I must be a really slow learner.
I said it above, I really like my AT-X. But I had an excessive copper fouling issue with my factory 6.5CM barrel and I got (0) returns on my voicemail and email that I left AINA about it. So, I gave up on that tube and continued marching on. At least I have the quick change ability, and a new barrel is only about a $1K setback by the time it is all said and done.