Sin Jac Heating, Electrical & Air Conditioning

I wanted to like these guys. We live in an older home and are looking to find someone reliable and affordable to service our swamp cooler twice annually and repair any electrical issues that come up in older homes.
We’ve used them before — no complaints. However, most recently, we scheduled them to turn off our swamp cooler (something we really know nothing about or we would have done it ourselves). He said he would come on a Thursday, but wouldn’t give an exact time — so I waited all day. No one showed. We called the next day, said he would come that day, but wouldn’t specify a time. Waited; he showed up, took care of the issue, was paid and everything seemed fine.
A few days later we noticed a leaky pipe in the garage where he was working, so we gave them a call and asked them to come by to take a look. Frank (the owner) asked us to make sure the valve was shut off all the way (there were two valves which appeared to be closed fairly tightly). So he scheduled to come Friday (no time specified); doesn’t show up. Called back and he agreed to come Tues. So we wait…
Frank (the owner) arrived — although he was not the person who did the last service — and took out a pair of pliers to tighten the valves. He seemed annoyed they weren’t tightened properly and said he asked us to do this before coming. We paid the last guy $ 100 to do the job (and tighten the valves upon finishing), which he clearly did not do. And then Sin-​Jac bills us «just $ 35 for the service call» — which wouldn’t have been necessary if his employee previously completed the job correctly.
This is just bad customer service. We were essentially stood up twice, required to pay (twice!) for a job not completed correctly, and made to feel we were inconveniencing him.
Needless to say — we’re looking for a new electrician/​contractor in the NorthWest Denver /​Wheat Ridge area. Suggestions?