Work order not being completed

We have a work order in place to bury a line that was replace this winter. I requested this the end of April and was told a technician would be out the following Saturday. Saturday came and no one showed so we placed a call again and we're told the following Sunday they would be out. Again no one came. Called and now the date was Monday, then Tuesday, then Thursday. We are still waiting. I don't believe customer service knows what is going on and should not be in charge of setting these appointments! Someone is. Charged of the people burying lines should be setting the schedules! 

I have been unable to do any lawn .aintainence on my yard with this line laying above ground.  I am angry, and feel i have been lied to by 6 customer service people. I want to know how this situation will be fixed and when. Is there anyone else that can follow through? Not a word has come from anyone involved about why this is not being completed. I was important only until you started billing me monthly for service, since then I am just an account that money comes from. Your service is an embarrassment and I will let everyone i know what is going on.