Bad service n bad communication by the entire company as a whole. How can technicians do a goodjob if even the directors ar nt accessible

I just had installation done at my house. The u only receiv network whn u go to the street outside the yard whn u ar in the yard ther is no connection. Tried phoning the technician who installed it to com fix this he was rude n hung up on me. Whn I try complain on emails provided I get the response that I am nt on the list of emails listed to send emails to directors. N u think they ar proffessional.