Myiweb

i have had fiber installed at my Home/Office with a 100/100 mpbs contract. it has been nothing but issues from day one of the installation the first week was Myiweb blaming Vumatel and vice versa, once they got the signal sorted out I have had nothing but bad line speeds I'm lucking if it gets over 40mbps and Myiweb give me one excuse today and then a different excuse on another day always blaming something, then to top it all off they now say I get the speed when I'm hard wired to the router ( but that is not what they offer they offer WIFI). I understand that i will not always get 100mbps speed but nothing better than 40mpbs is ridiculous over the past 2-3 weeks i have asked for someone from management to call me ( not once have I had a call). all I want to know is if i will get a solution to this issue