ADSL line slow - Call closed and line still faulty

I have been reporting a faulty ADSL line for the last 6 months. at least 1-2 calls a month and the issue still remains. Slow internet, intermittent and often none. Last call logged was closed with no comments and the fault remains. No service delivery. Lack of communication. Rude call centre attendants and just the general lack of getting back to their customers. Another call has been logged, who knows what will happen or if this issue will ever get resolved.