Telkom dreadful service on fixing landline problems.

I have been over 3weeks without a working landline. Loud crackling phoneline no dial tone cannot make or receive calls. Plus off and on internet very slow . We get occasional calls to say technician will come but no one has and problem still not fixed. I use all my airtime up getting through to faults to chase up what is happening. So far really poor non-existent service.