HOW CAN I GET USELESS TELKOM OUT OF MY LIFE

On 7 April I first log my fault that my residential ADSL line is down (ref 98CRK070418). I call the Call center numerous times to follow up. On the 14th of May, I call one more time only to find out that a Technician was at my house - HE NEVER WAS - fixed the fault - WHICH HE NEVER DID - and the case was closed ON 9 May. At that time I have been without Internet for more than a month. I log the fault again (ref 180CRK140518). It has been another week, and still my line is down - HOW CAN A NATIONAL SERVICE PROVIDER BE SO USELESS??? The cheapest service in the country???? REALLY???? Cheap definitely comes at a huge cost.... I have requested my credit, which they so generously advertise - NO FEEDBACK. I have send through 3 x requests to cancel my service - NO FEEDBACK - how can I get useless TELKOM OUT OF MY LIFE....