no service

very limited or rather no service for that matter from telkom. we are paying line rental and for the 'service' but we don't have any service. it is always the 'instrument' that is faulty and have to be replaced. about three weeks ago, new wireless instruments were installed by telkom: \These will work!"telkom stated that additional equipment have to be installed. we have not heard from telkom again. we have not seen any person from telkom again. what do i pay for? i would like some feedback. thank you """