Costco

We needed to add insulation to our attic of our house so we decided to hire Costco who subcontract it out. We thought we would be getting a Company that Costco has verified as a trustworthy quality company. We though Costco would help and protect us if insulation company did us wrong.
Instead we got an insulation company that put too much insulation in the attic making the air ventilation very poor if any. Also insulation company untruthfully saying they added baffles to every joist, I could only see 4 baffles that were useless because some were blocked. This resulted in leaking bathroom roof, multiple nail pops throughout the roof and maybe mold starting. Costco has stopped using this insulation company.
We have a leaking roof since March 2022. It is November 9th 2022 and we still have a hole in bathroom ceiling and a roof that leaks with winter coming. I am not one bit surprised; no contact has been attempted by Costco. Throughout the summer Costco kept saying we will escalate it and then we do not hear from them. At the end of August Costcos insurance company contacts us. Not very help full. We are doing all the work, trying to communicate and settle with the insulation company that has damaged our house. As result of damage done by Insulation Company that insulated out house attic we expect them to pay for removing the insulation, test for mold, remove mold if any, redo insulation, repair bathroom ceiling, replace roof. This cost is expected to be very high (too high for small claims court) and so far they have offered to pay a small amount. We had to hire a forensic engineer to prove the damage they have caused. The report did indicate the insulation was the problem. This is very stressful for my wife and me.
If anyone is thinking about using Costco for home kind of home service, think again. They will help you for small items but if you have a major problem you are basically on your own. Our cost for repairing all is more then $38,000 as of now.
Also the new insulation company Costco is using do not answer your email or phone calls most times, so you might want to read reviews about that company if dare use them through Costco.
I complained at BBB. No surprise, Costco would not reply