Slow Internet due to low noise margin

I have been struggling with a half decent internet for the past few months as I have given up on complaining. The connection is getting worse and has gotten to a point where I cannot even use it at certain times and am forced to use my cellphone connection. <br> <br> I need this to be sorted asap as I use the connection not only for private but also to log into my work network. <br> <br> I hope this will resolved soon <br> <br> Adsl. No. ***