Line still faulty after reporing it 4 times

I have a business line with Telkom. Over the past 6 months I have reported the line as faulty at least 4 times. Every time they send someone, I explain the problem and they \fix"it but the problem is still there. The last time I spoke to a person who said he knows exactly what the problem is as I am not the only person on the 012 333 extension with the same problem. Well"