Still no phone after 5 weeks

We reported that our line was down 5 weeks ago, a technician came through to the house 3 weeks later and supposedly fixed the fault. 2 days later the line was worse than ever. We reported it again, and a technician said he would be coming through to fix it and we are sill waiting.. We have called 3 times now to report the fault. I use this line for my business and I am losing out on business. This service is not acceptable