SLT doesn't provide fiber line.

I have more than 5KM to last loop of the SLT fiber line. SLT has not extended that line since past 3yrs-4yrs. So is there any way I can complaint to higher place or get it somehow? I really need this now. Im a person who is suffering from lots of connectivity issues. There is no any coverage. Only dialog has very low coverage. Complaints to SLT seem to be not working. SLT Regional branch is Ambalangoda. They don't do anything about this. Please gimme some suggestions or way I can get this.