Am I obligated to pay for a service call when the technician declined to provide service?

I was having issues with intermittent loss of water pressure from my dug well pump. I called a well technician, who came and looked at my well and expressed some concern because it is a dug well, and there was some roots in the water. He was prepared to pull the pump to see why it was malfunctioning and had a replacement in his truck that I agreed he could install. He said he needed to think and do some research, went to his truck and spent about a half hour. He emerged to say he had conferred with his boss, who had told him they were unable to service my well because to do so would be in contravention of their license. The only solution they could offer was to recommend I drill a new well. He provided a ball park cost estimate, based on the depth of nearby wells. This week, two months after the fact, I received a bill for a one hour service call ($180). Does this seem fair and legitimate. I want to do the right thing and am happy to pay if this is standard practice - but I am questioning what I am paying for??? Thanks for any insight.