Same issue here (Cricket and TA-1045 bought at BestBuy stuck on June update). Support chat is going in circles and trying to get them to escalate to proper technical team seems to be a futile exercise.
I will give it another 2 weeks or so but then will initiate a forced return/chargeback through my credit card company for the phone being materially different from specifications (missing Android One monthly security updates)
I am in the same boat as you -- bought a TA-1045 in early July. It downloaded the June patch immediately and I have gotten nothing since then. Between the 2 non-existent monthly security updates that I thought were included with Android One and the terrible camera performance/compatibility with no patches, I'm definitely regretting my purchase and can't recommend the phone to anyone else.