Failure to solve problem with slow connection

I have had a problem with slow speed when connecting to the Internet for more than 4 weeks. The problem has not been solved despite numerous calls to the call centre. The download speed ranges from ,24 to ,89 Mbps and this is supposed to be up to 2 Mbps. It takes a long time to open internet pages, pictures on internet pages are not displayed and videos do not play.<br> The first call was on 16/03/2016 and I have made 9 calls to the call centre. I have been asked to switch off the router several times, router rebooted, port changed, factory settings restored with no solution to the problem. I have been told by call centre agents that a query was sent to the department dealing with slow speed, sent to cable department, someone would call back with regards to the problem and the problem is still there. A technician came out on 01/04/2016 and closed the fault without solving the problem. He came out again on 10/04/2016 and closed the fault without solving the problem. Another fault was created again on 11/04/2016 for the same problem and nothing has been done with regards to this fault.