Bad services

I'm struggling to make contact with Vuma *** to speak to a Vuma Representative but with luck and to be honest I've never actually spoken to anyone by calling this number. I'm struggling to get an Technician to come and install services. Rodger (Technician) called me late in the evening around 9:30pm on 31/032025 to say he's here to install my services, not taking into account that it's late in the evening and my family is sleeping. He said he'll call me back early in the morning, which he did, but unfortunately I was already at work and in a discussion with my Manager. Now when I call him back, he's not taking my calls. How does one get inContact with Vuma or get assisted?