That is an enormous amount of money to spend on home efficiency products. It would likely take a very, very long time to recoup that money via lower energy bills - even if the products worked as claimed - although of course you can't put a price on reduced allergies, again, if allergies had indeed been reduced.
I did look up the AG's settlement and added it below. The agreement seems to have been that the AG agreed not to take them to court over their claims as long as Healthy Homes 365 agreed not to advertise in Wyoming again. It seems likely that Healthy Homes 365 provided the products to a 3rd party contractor, Premium Home Efficiency.
How did you hear about this company? Did they advertise or solicit you directly? If Healthy Homes 365 is just putting itself at arm's length (unclear) and you are in Wyoming, the AG may be interested.
Were any of the statements regarding results put in writing or via text? If so, you need to keep those. If you were ever told that you were on a call that was being recorded, those records should be requested. Do you have utility bills showing little difference in energy use?
Write down everything that you can remember being said before you agreed to these pricey products. If a salesman or company made promises or gave estimates that you relied on for making the decision to sign off on this expensive installation, you may have been subject to what's called "fraudulent inducement."
I read through the Healthy Homes 365 complaints on the BBB's website. The company appears to keep its rating by shifting the blame to the installers, which is ... interesting...given that the complaints are mostly about their products. Unbelievably, they claim that they have scientific case studies supporting at least their ECO Probiotic System ... but it is only available if you sign an NDA.
This is utterly laughable, in my opinion. An NDA (non-disclosure agreement) is for investors who are looking at detailed schematics or compounds etc. A case study showing actual results for products already sold on the open market does not need an NDA. I strongly suggest that this quirky little come-on be reported to your AG.
All this is just my opinion, based solely on what you have written - given that the company hasn't responded - but I hope it will help point you towards the questions you need to ask and the documentation you need to gather if you have to take this to Small Claims Court. If you do that, I believe the limit in Texas (which is where you will have to file, regardless of where you live) is $20,000, so you're well within that amount.
My recommendation, per what I know so far, would be to settle with these companies. I don't know who profited and how, so it will be between the two of them to assign the division. Obviously you are owed the $525 already promised. Are the products completely worthless? Would you settle for a 50% or a 75% refund if the products were left in place rather than being taken out?
Healthy Home 365, LLC (Case No.2019-04)
Healthy Home 365, LLC is an entity that advertises home efficiency products online. The Attorney General investigated Healthy Home 365 based upon concerns with claims the entity made about (1) the origin, sponsorship, approval, accessories, or uses of its products and (2) the purported health and energy savings benefits of its products. In lieu of continuing its investigation or instituting legal proceedings, the Attorney General entered into an Assurance of Voluntary Compliance with Healthy Home 365. This agreement resolved the matter without any judicial determination of the merits of the case. As part of this agreement, Healthy Home 365 agreed, solely for the purpose of avoiding the expense and uncertainty of litigation, to pay $45,000 to the State, transfer its registration to another state, and refrain from advertising its products in Wyoming.