ADSL line down for 4 weeks

My business phone and ADSL line has been down for 4 weeks. This is a disaster as my business relies on access for coaching calls and business research. The first two times I reported the error the faults were closed without the problem solved. I am now contacting the call centre every two days but their attitude is that it is not their problem as the infrastructure guys are supposed to be looking at this. And they are not willing to give me any numbers or a way that I can contact the infrastructure department. I have escalated this problem several times now with no success. Telkom is very successfully putting me out of business at the moment and I don't know what to do about it as no one is willing to assist me at Telkom. One lady at the call centre suggested I buy data from my cell phone provider.