Customer service is non existent - FailZero M16/M4 Bolt Carrier Group (BCG), No Hammer

I have about 8 failzero bcgs. I have had them for years and because of how well they had worked I just kept buying them. Well I have 3 that are brand new, never put in a gun that just sat in my drawer with extra parts that started to rust. I called repeatedly and left messages with failzero customer service as well as email them with pictures. Never once did I get a reply. I tried to clean them with the hope that maybe if I cleaned and oil then then maybe everything would be ok and the coating bubbled up and came off. Stay away! I Will NEVER BUY FAILZERO AGAIN! At least a warranty denial would be better than no answer at all.