Conflicting information and Lack of service

My son reported his telephone line faulty on 3/8/15. To date the fault has not been sorted.I have made more than 13 calls to the call centre and every time I call, I get a different reason as to why the line is not repaired. I have been **** to and told that the matter was escalated on 06 Aug, only to be told the next day that no escalation was done.A request to speak to a supervisor was refused - saying no supervisor was available.My call was dropped on numerous occasions.Finally after 5 calls on 8 Aug, I spoke to a team leader - Siya. He assured me that he will handle the problem and gave me a escalation number.Siya called my son on 11 Aug and they made arrangements for a technician to come to his house at 6pm that evening. A person called my son at mid day saying he was the technician - my son told him that he was at work and told him of the arrangement. The person cut the call without even saying whether he would be back. I called the call centre again - once more getting conflicting reports - one saying no technician was assigned, another saying they could not get through the technician. Repeated e mails to Siya are being ignored. Unacceptable service.