Help please

I am trying to get in contact with New aerials in Tring. Daniel fitted a new TV aerial several months back and it stopped working. I have had great difficulty in contacting him by mobile phone. He injured his foot and I have been patient in waiting for him to recover. He is due to come this afternoon but has not arrived yet. He is not answering his phone or responding to messages. This is the second time he has let me down. I cannot seem to find a phone number for this company Barbara Jarman