Inflated charges - incorrect billing.

I called Monsoon irrigation when my borehole was not switching on. They sent someone out and they pressed the reset button and left shortly thereafter. During this time Tshepo, the technician was on his telephone twice and also stood in front of my gates calling someone back. This is relevant because the company ended up saying that the person was here 45 min long when in actual fact they were no longer than five minutes, without any work being done. They ended up charging me for labour and for electrical work besides the call out. When I complained about the invoice, Kevin said they won’t do work at my site again. I certainly won’t want them to either. Kevin is not charging for cost or expertise, they will inflate the clients bill as they see fit for what ever reason. They also did not confirm upfront what they will charge. I don't have a problem to pay a fair bill but I have a major problem with companies that ****** their clients and then make as if it is the clients fault. Terrible company and terrible people. Never again!