Telkom fault for the last 6 months

I have been struggling for the last 6 months with my adsl line with Telkom. speed drops then when resetting router i don't pick up dsl. Reporting the fault but Telkom only sends a sms each time saying the fault is restored but a few days later the same problem. Telkom does not even try to sort out the problem Bought 2 other routers on their advise did not resolve my issue. Paying for a service i cannot use and theypass the blame every time. What can i do.