Des Moines Heating and Cooling

As you can see on this website, DMH&C is not accredited by the Revdex.com like their website claims
Here is our experience
Our year old Lennox furnace quit heating overnight 02/24/
We called DMH&C 8AM 02/(falsely advertised to be a Lennox dealer)
Craig arrived 6PM 02/25, he blew in a hose to get the furnace working again
Craig ordered a pressure switch but told us we'd only be charged for the labor (due to Lennox warranty on our furnace)
The furnace quit heating again overnight 02/
We called DMH&C 8AM 02/to let them know
John said he'd have the part by Friday (02/26)
We dug out space heaters to heat the rooms we were in
No calls from DMH&C, so we called again at 8AM on Monday (02/29)
John said that they are no longer a Lennox dealer (as advertised), so the pressure switch wasn't in their inventory (we have a very common furnace)
03/John called back (the only time that he did) and said that Lennox had mailed the part and he expected the receive it by 03/or 03/at the latest (we don't understand why it wasn't expedited)
We waited and waited and waited to hear back from DMH&C, but no calls or correspondence of any kind
So, we called DMH&C again at 8AM on 03/
John said that he had "just received the part that morning" (at 8:06AM?) and that he was just about to call us
The furnace is finally working again at 2PM on 03/(yes, more than two weeks after our initial call)
It took five minutes to install the new pressure switch
They charged us $for the service call, plus a $"warranty claim fee" to order the warrantied part, plus tax
We won't be calling them again unless we have no other choice, would you?