TELKOM AFTER SALE SERVICE STINKS !!!!!

We currently running a 100mbps with Telkom. I don't believe Telkom can actually supply this coverage in Northmead Benoni where we stay. Our Fibre line reached between 50 & 60mbps on a good day. I have phoned on numerous occasions and they reset the lines etc but no change. My last call to customer service i was told the router might be faulty i need to take it into any telkom outlet. I then took my router to Telkom in Lake side mall , only to be told they don't have technicians there and need to go to East Gate. East gate is out of my way and inconvenient for me. For Telkom to send a technician to my house they want to charge me in the R1800 region. I think this is absolutely ridiculous and feel i am paying a fortune for nothing. Telkom after sale service STINKS !!!!! I would love for them to sort this out or i am going to stop paying.