Telkom technicians not up to standard

My business telkom line is faulty now for almost 2 months and after numerous calls it is still not working. There was a technician (that we just saw working on the road and asked him to come to help us fix it!) to fix after about 4 weeks and it worked only for four days and became faulty again. Every time when i phone to complain again they only said that a fault has already been lodged and they will send the technician an email. Strangely every time the line went faulty was after they worked on the telkom box close by or on the telkom pole. i am so frustrated because of their incapability.