Vox telecoms

Good day .I app**** for a fibre line from Vox Telecoms.Then they emailed me and said it was declined.Then I received a email about installation.I informed the lady I was declined so I made other plans regarding internet services. Next thing a tech arrived , although I cancelled or they declined me . So my wife told the tech It was declined we don't want their services anymore. Now they keep on sending statements for something I don't have ,and they declined. They charge me now over R2000 for a debit order that didn't went off . For something I don't have .I asked them to send the tech to come and check if a line or router was ever installed at my address. They must pleased stop harassing me .