I need to update this short piece of non-fiction: ...

I need to update this short piece of non-fiction: the Bosch boiler they installed had a faulty valve. Genz-Ryan were still on the hook - in writing - for a full parts AND labor warranty. I was skeptical, but the repair was looking to be expensive, so I called them.
Genz-Ryan honored their warranty, covered the parts and labor, and my combi boiler is working fine again. They did right by me and my family, and I need to acknowledge that.
About 3 months ago they made sure I'd received all the receipts from the initial installation.
I believe they've turned it around.

I'll leave the old review below for the sake of history.

You'll notice they said in their reply to this post that "one of our managers will be reaching out to you to talk about your situation and work to fix it." Noah called but to the best of my knowledge, he's not a manager. It's been over a month. There's been no call. Is adding a tag like this to a google review an honest way to do business? Read on for the details:
We had worked with Genz-Ryan in the past and had been impressed.
We needed a new boiler and on the recommendation of our Genz-Ryan HVAC tech, Noah, we decided to get a "top of the line" Bosch combi boiler.
The install cost over $10,000.
I got to see 7 different employees over 4 days, and it took them 5 days to get it working over a period of a week. I had to "deal" with them for 10 consecutive days.
I have made 4 requests for receipts. They came incomplete totaling only half the cost.
I made five requests for the outdoor sensor to be attached to the boiler before getting a response other than "it doesn't need it."
Their automated system asked for customer feedback before the boiler was working or before I had received any receipts for work done doesn't work.
Genz-Ryan told me twice they were certified to install Bosch boilers. I called Bosch. Bosch told me Genz-Ryan is not certified to install Bosch boilers. "I'm sorry sir, but that company is not on our list," the people at Bosch told me.
Before posting this review, I sent it to them asking them to help me conclude it. I got a call from my initial technician, Noah, but there has been no effort on the part of management to acknowledge a problem. I still do not have all the receipts - I am missing the receipts from Joel's visit for half of the total charges.
In order to have some peace of mind, I had to hire another HVAC Bosch certified specialist to come and inspect Genz-Ryan's work.
Everyone is very nice at Genz-Ryan, but this experience adds up to a lack of competence across the board. If you search through the one star ratings, you'll notice the copy/paste response of their "striving for world class customer service." World class? What world are they talking about? Courtesy and thoughtfulness are great attributes but are worthless in the face of such a display of repeated incompetence.
Could I please get that receipt now?