Worst Customer service and Network don't even reach the full flat

I have been struggling with my network since the 18 of July. We upgraded it to a 1GB line... with Metrofibre already accepting our payment but the network is slower than before ! We have logged MANY tickets and yet to get anyone to assist us properly! 8 Aug the last ticket was logged with ALL information on it but still no assistance. I will be taking this a legal route as we have been paying for a service we are not receiving