POOR CUSTOMER SERVICE

i recently have not been getting the internet speed that i am paying for. I have been calling Telkom's call centre a number of times and each time I am told to troubleshoot with no success. i am then advised that a technician will visit my home to check the line. i then receive an sms saying that the matter is resolved when there was no technician that came home to fix the line. i need some assistance urgently!