ADSL useless

Trying to fix Adsl problem for the last 3 months with Telkom. Logging countless faults with them only to get fault restored messages from them without the problem being solved. From 0.11mbps speed to intermittent service on a supposedly 4Mbps line. (Which is the highest we can get in our town?)Cannot continue like this. Can’t do anything with this line. Emails about all we can do. Will have to change providers. It’s a shame...been with telkom for years and now nothing.