Fibre service so bad its almost world class!

I am a new Vodacom Fibre customer and only 2 month in my line speed has dropped from the 40mb I pay for to something that fluctuates between 1 and 10mb. I use this for my work and for television streaming which now dont work. I then logged a call on the 14th of April and nothing has happened up until now on the 8th of May. I have phoned over 5 times to follow up and every time told its being escalate and someone will come back to me soon. I am utterly shocked at how pathetic their service is. Now i am making it my personal mission to inform everyone in my neighborhood and make sure they get zero business in our area.