Still having the same issue September 2017 despite numerous attempts to contact MWEB, who never responds

I have had the worst experience with MWEB since signing up in September 2017. They provided me with LTE-A and it has not worked correctly since the first day. My speeds are nowhere near the minimum 10 mbps advertised (mine are around 1mbps, uploads at around 0.05 mbs) which makes any internet-related activity nearly impossible. Numerous attempts to sort this out have been ignored. Nuraan from MWEB called me and said they would sort the speed out and that was more than 3 weeks ago. Since then, despite many attempts to contact them via the online logging of queries or Facebook have been blatantly ignored. I have now requested cancellation and they cannot even get that right. I either want the advertised 10 mbps speed or I want the contract to be terminated, a refund for the router and my monthly fees reimbursed as I have not had the service as advertised.