Telkom seriously can't help with anything

We have had constant issues with our fiber line since moving to JHB. We had a brand new line pulled with Openserve as I had an existing contract with them and we have not had our contract fulfilled by telkom at any point. We have a 100MB fiber line, uncapped. We have at no point received more than 40MB. I have logged multiple faults, had a technician come out to only tell me my router was too far away? Yet I have full signal. Went through the process of moving the router more central in my home and yet the issue is still not resolved. I will stand in the same spot for 5 minutes doing speed tests and get rapidly different results, 1MB then 30MB then 5MB in a matter of minutes. So I log another fault, they ask me to enter a test account jnto my router and advise to test for 24H, I let them know I don't know the password for my internet account which they said they would provide to me after the tests are done. Now this morning, 8H from the time I entered the test account into my router I have NO internet at all. This is ridiculous, I am not receiving the level of service I have paid for, for months now! I will be canceling my contract and so help me if they expect me to pay a cancelation fee.