Business ProfileforMetro Fire Equipment

I first received a call from Metro fire at 12:33pm on February 3rd regarding service to my fire suppression system leaking through my ceiling. Metro fire got to my place at 2:30pm. They left around 5pm to go on another call and said they would be back at 6:30pm to turn on the water and make sure it doesnt leak. They arrived back at 6:59pm at my door to make sure it wasnt leaking and left within a minute. February 13th I received the invoice from Metro Fire. I emailed back asking for more info on the invoice. No response. I spoke to someone in billing February 16th that couldn't answer any of my questions regarding my invoice. She said my service started at noon and lasted 4 hours. Then they came back and were there another 2.5 hours. I have times documented on my ring and text messages. That is not correct. I was forwarded on and then had to leave a message with the receptionist because no one was answering. I was told I'd receive an email on Friday and did not receive one. I was told for an emergency call there is a 3 hour minimum labor charge but don't think I should get penalized for the 2nd trip when he said he had to leave for another call.February 19th I received an email from Metro Fire stating they did hear back from the manager.(The 4 hours of labor is correct, and the emergency rate is $217.50. After the tech had everything back together, he had to wait for the glue to dry before he could run the water thru the system. He did leave and go back several hours later. You were billed for 2.5 hours that time. The manger is deducting the half hour. You will receive a new invoice once it gets processed thru the Billing group.)I reached out trying to get more answers. Arriving at 2:30pm and leaving around 7pm still doesn't add up. Am I being billed for their travel out to my place and for the time they were at another call? If their call took longer why am I being billed the whole time the glue is drying extra over the 15 minutes to two hours recommended?