POOR FIBRE SPEED NO ASSISTANCE!!!!

Good day, As from yesterday we have been struggling to get the full download speed that we are paying for (as per attached documents). My husband phoned numerous times yesterday to get this fixed and still we have no download speed. We have this fiber contract for a week now and it's just giving problems. We are now sick and tired of struggling. If this is not fixed today before the end of business i will cancel my contract and i am in any case going to report this matter to you. I also requested a refund for the period that I had to struggle with 20 mbs and i am paying for 100 mbps.