Not sure that notifying the AG of Texas will: (1) document the theft from law enforcement's perspective, (2) satisfy your insurer's requirements (3) engage the storage company (4) get your stuff back any time soon. But then I am NOT a TX attorney.
Seems like you went the bureaucratic route--many would have called police and the storage company first. Then maybe a lawyer.
Did you have a legal question?
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Have an attorney write the storage unit company. They likely have insurance for thefts. You don't indicate if by stolen, you mean sold at auction. If that's the case, you still need an attorney, but the case is far more complicated.