Telkom hopeless

I have been paying for a 10mb ADSL line for about 8 months. My line went down and I called Telkom to help, They said to me that I am actually connected to the 6mb line, so I have been paying for a 10mb line while I am on a 6mb line. theres no one who can help me downgrade.

As of lately my internet speeds have dropped drastically and I do not have a stable connection, I am getting 0.05kbps download speed on average and theres nothing Telkom wants to do about it. I have logged multiple faults, but theres no solution