Due to lack of providence for a stable connection, Telkom caused a major loss in a valuable business client

For the past couple of months, every day from around 6pm - 9pm (sometimes to 10pm) my 10mb telkom connection experiences an indecent brake of speed down to half, with latency of up to 3000ms, stabling at 256ms with up to 60% packet loss, stabling at 16-20% this is unacceptable as a graphic designer working with international clients through VOIP software, the instable connection is ridiculous, and is affecting my work and threatening my livelyhood. Now recently, for the past week the internet has become unusable throughout the day with a constant 150+ ping and a fraction of the speed that i'm paying for and I have lost a client because of it! I have tried to contact telkom to help solve the problem to no avail, as i just get passed around to other people, who also - do not show any sign of helping me. On my day off I spent 8 hours from morning to afternoon trying to sort this line that I pay for out of my own pocket while it's causing me to lose money in the process. I'm on here in hope's that I can get in contact with a reasonable person to help solve this issue with me but as of now I cannot recommend telkom's internet package any less.