Bad Metering installations

Contacted the company to install prepaid water and electricity meters. Very easy process. The problem came with the installation of the water meter. The installation was done incorrectly on a Wednesday and the meter got disconnected from the pipe in the early hours of Sunday morning. And caused my water to leak out of the pipe. During the installation, the switch off value was also removed. They finally send a plumber 5 hours later. I had to switch off my whole house water during this time. The plumber was here for 4 hours and couldn't fix the issue because he didn't have the correct tools. During this time the company confirmed there would be no cost for me as a result of their mistake. The plumber returned on Monday to finish the job and then they issued me with an invoice for this after they confirmed there would be no charge, and called it a non-tipical installation. And again the plumber didn't install the meter correctly and water was still leaking. I then had to get my own plumber the next day as they refuse to fix the issue due to their newly issued outstanding invoice. Don't do business with this company's terrible customer service. I still have not received any of my prepaid funds due to this outstanding invoice issue.